You can convert PUB files to PDF using the Microsoft Publisher software itself or use the free online Publisher to PDF converter tool.

Open the "File" menu and choose "Open." Navigate to the location of the PDF you want to use in Microsoft Publisher. Select the file and click the "OK" button to begin the file conversion.

If you don't have Publisher, Microsoft's desktop publishing program, and a business associate sends you a Microsoft Publisher file, you have several options for opening it: convert it into a PDF ...