While browsing Amazon.com on October 19, 2011, our antivirus system popped up notifications 35 times as we browsed the site. Every instance came up as “detected: virus ‘HEUR:Trojan.Script.Iframer’ (modification).” This is a heuristic virus detection which means our antivirus did not detect it as an actual virus or trojan but it did detect that the page was trying to do something potentially nefarious.
As it happens, this virus was attempting to open a hidden IFrame which could have contained a Trojan. Fortunately, we were protected by our antivirus solution.
This is just a reminder that you can never be too secure when browsing the Internet. Browsing without an antivirus solution in place is like swimming in shark infested waters with a bleeding leg. Even a site like Amazon.com that you would never suspect to get a virus or trojan from could have a hidden script waiting to infect your PC. Be sure to verify your antivirus solution is working and that its virus definitions are up to date.