There is a series of vulnerabilities in the widely used BlackBerry Enterprise Server software that could allow an attacker to compromise BlackBerry devices by sending a malicious PDF file. Research in Motion, the software s maker, has issued a patch that fixes the problem in BES, as well as BlackBerry Professional Software. The vulnerabilities lie in the PDF distiller component of the Attachment Service, which handles file attachments at the server level before they are sent to the end-user devices. If an attacker sent a malicious file to a vulnerable version of the software, opening the file would cause a memory-corruption error, enabling the attacker to run code on the device.
Source: https://threatpost.com/rim-issues-patch-serious-pdf-flaw-blackberry-software-052709/72752/