You know by now not to open unexpected email attachments, but what if someone that appears legit sends you a PDF? How harmful can it be? As it turns out, very. This week a harmless-looking invitation to a Nobel Prize ceremony was a nasty piece of business indeed. When saved to a hard drive and opened, it sets up a backdoor so that the bad guys can take over your PC at will, all while you think nothing is going on. What is troubling is that this isn’t new. This PDF exploit has been around for several years, yet it seems that it doesn’t get much attention from the general public. The security community is all over it. Here is a collection of articles that appeared on SearchSecurity.com earlier this summer that tells corporate IT folks how to secure these type of files.

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