PDF most common file type in targeted attacks

Source: F-Secure Weblog

F-Secure has measured a significant shift in file types used in targeted malware attacks between 2008 and 2009. Of the four file types PowerPoint, Excel, Word, and PDF, 2008 saw a fairly even spread of targeted malware, ranging from 17% (PowerPoint) to 35% (Word). So far in 2009, PDF is way out in front (49%), along with Word (39%), while PowerPoint and Excel also ran (12% combined).