Bad PDF file can crash some Apple devices, and now the trick is public
Researchers have shared a test file that can crash Apple devices through a harmful PDF, tied to a flaw Apple says may already have been used against certain targeted people. The issue appears to affect iPhones and Macs that have not been updated, and suspicious PDF files sent through messaging apps may be one possible way it spreads.
Who is at risk
People using iPhones or Macs, especially those who have delayed software updates or receive PDF files from others, are most at risk.
What to watch for
Be cautious of unexpected PDF files, especially in messages, and watch for your Apple device suddenly crashing or restarting after opening one.
What to do
Update your iPhone and Mac to the latest software right away and avoid opening PDF attachments or files from unknown or unexpected sources.