Adobe s security response team is scrambling to investigate new public reports of a new zero-day vulnerability affecting uses of its widely deployed PDF Reader software. Adobe confirmed it was investigating a code execution flaw, which affects Adobe Reader 9.1 and 8.4.1. Adobe plans to provide updates for all affected versions for all platforms (Windows, Macintosh and Unix) to resolve this issue. Users should beware of strange PDF files arriving via e-mail, even if it comes from a trusted source.
Source: https://threatpost.com/adobe-pdf-zero-day-update-turn-javascript-042809/72652/