via Erik Larkin, pcworld.com...
The popular Adobe Reader is a favorite target of online crooks, according to Mikko Hypponen, chief research officer with antivirus company F-Secure. And for better security you should ditch Reader and go with a free alternative...
Poisoned PDFs are also often used as part of a customized, targeted attack, he says, when they're sent to a specifically selected recipient attached to a well-crafted e-mail. (more)
Look for FREE alternate readers at pdfreaders.org