US-CERT is aware of public reports of improved attack toolkits for exploiting vulnerabilities in PDF reader software.

US-CERT encourages users to do the following to help mitigate the risks:

• Do not open untrusted files or files of unknown origin.
• Install antivirus software, and keep its virus signature files up to date.
• Regularly apply software patches and updates as supplied by the vendor.

Read more: US-CERT Current Activity