The .CFM file extension stands for Cold Fusion Markup (language). You don't see it very often, but when you do, you may have a problem opening or printing the file.
A PDF is a PDF by Any Other Name?
If you open a .CFM file using a Text Editor, you'll see mostly unprintable characters. But there's a clue to how to open the file amid the jibberish.
Close the file. Change the extension to .PDF. When you do this you'll get a warning:
Look at the file properties (Select the file then click the right button mouse or type control-click).
Changing the file extension also works if you want to open CFM files on Windows PCs.