PDF&#x27;s have been known to have exploits and IIRC how mobile treats downloaded pages (HTML) in a web sandbox, IIRC PDF&#x27;s need to be downloaded to the device to view. Resulting it being a larger security risk than a web page:<p>See this for some known exploits:<p><a href="http:&#x2F;&#x2F;www.malwaretracker.com&#x2F;pdfthreat.php" rel="nofollow">http:&#x2F;&#x2F;www.malwaretracker.com&#x2F;pdfthreat.php</a>