![]() I'm not sure if they are exploited for malicious purposes, but they exist and thus can be exploited. There are even particular techniques for optimizing the website loading speed. If regular web developers are aware of this fact, malware authors definitely know this and probably exploit this feature to infect computers even if the user closes the tab as soon as possible. How can I run Javascript code before the whole page is loaded?Īs an example, see. In fact, there are several questions on StackOverflow asking: This is absolutely possible, even if the whole page didn't load within 1 second. Javascript) in the URL was loaded within 1 second, your computer would be infected. ![]() Imagine that you closed the tabs after 1 second from the redirects. Unfortunately, the fact that you immediately closed the tabs doesn't mean that your computer couldn't be infected. What I mean is that the content is exactly the same in any case and, as a result, that any effect (malicious or not) would occur in any case. For all purposes, a URL is a URL, regardless of whether you clicked on it or were redirected by another website. ![]() However, let us assume that they were actually malicious redirects. , but keep in mind that these data (1) are stored in webserver logs when you visit any kind of website, so they are not exactly private. It is not clear why the second URL includes parameters related to your IP address, ISP, browser version, etc. In particular, I analyzed the URLs you quoted with VirusTotal, and they don't seem to be malicious. While these are the main purposes for such redirect chains you will also find (usually shorter chains) for more pleasing use cases or for user tracking.įirst of all, as Ullrich suggests, a redirect is not automatically malicious, even if it is definitely possible. It is not always clear from looking at the chain if this is pure ad-delivery, pure malware-delivery or malware delivery triggered by ads (i.e. And you have the parties which serve the well tested latest version of the exploit, sometimes as payed service (see also malware as a service). The same kind of delivery chains are used with malware because here you also have the parties which provide the victims through ads or through hacked sites. Because control from one party to the next party is handled through redirects these information will be encoded in the URL and that's why you'll see this long URL's with various encoded information. In such delivery chains each of the party needs to get some information about the referring party and about the original user to decide which ad to serve or which next part of the chain should take over. This is especially true with targeted ads and real-time ad-bidding networks. ![]() Very often you will find such redirects when ads gets served because ad-delivery is today usually a multi-step process with several parties involved. I'm often very cautious on what I click on because of redirects like this, so I'd like to know if my cautiousness has any logical grounds.Įxistence if such redirects by itself does not mean malware in all cases, but it can be. Without clicking on any of the content in the urls that were loaded, could malware/virus or other malicious code infected my computer or browser session? My question is, these redirects seem purposely malicious. Looking through the history, theres some strange urls it redirected to: (In code blocks so you cant accidently click it)Ĭlicking on this quickly loaded 2-3 different sites before I closed the tab. ![]() Recently was browsing and clicked on a link to the following address: ![]()
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