PDF files are vulnerable to virus attacks?

PDF files are vulnerable to virus attacks?
Portable Document Format (PDF) is a document format that is currently widely used by computer users. Events are unfortunately exploited by malware authors who deliberately makes an easy target for malware attacks. The malware authors do ekslpoit on a number of weaknesses in Adobe's PDF, so that format can not be used.

More than 50% of attacks carried out via the Trojan to a PDF file. The majority of the attackers developed from traditional attack methods such as email, the attack on the PDF, which is considered as the simplest way to spread malware all over the Internet in the world. PDF is often used as a target of malware since doing plug-in support in a web browser. When a user visits a malicious web, PDF documents served by HTTP, and during the process of malware into the user's machine without realizing it.