PCWorld: Researchers at McAfee say the percentage of malware that exploits PDF vulnerabilities has skyrocketed. In 2007 and 2008, only 2 percent of attacks targeted bugs in Adobe PDF software. In 2009, that number increased to 17 percent, and in the first quarter of 2010, it has jumped up to 28 percent.
"In the last three years, attackers have found PDF vulnerabilities more and more useful, for a couple of reasons," explained McAfee's Toralv Dirro. "First of all, it's increasingly difficult for them to find new vulnerabilities with the operating system and within browsers that they can exploit across the different versions of Windows. And second, Reader is one of the most widely deployed applications that allows files to be accessed or opened within the browser."