In the first quarter of 2010, Adobe products were the number one target for hackers. It is believed the reason for this is because of the multi-platform capability of Adobe products like Flash and Acrobat PDF. Many users are not aware of the dangers of opening PDF files from unknown parties.
The Adobe Reader & Acrobat exploit Pdfka was by far the most common at 42.97%. Combining two of the most common exploits for Adobe products yields almost 50% of the total exploits found in that quarter. Many Adobe users do not frequently update their software to the latest versions much less apply recent patches.