Background: Some customers reported that they met unexpected windows popping up when opening some PDF files. Note that this may be caused by the java script settings embedded in the PDF.
How to check?
2. On the functions list, user could check/edit/delete the functions. For example, there is a script "EmbeddedJS" embedded in a PDF and it is to call function "print();" as shown like following picture.
Then, when user open this PDF, there will be a printing window popping up automatically like below picture.