: Check the "Document Properties" (Ctrl+D in Acrobat) to see the "Actual Font" name listed next to the CIDFont label.
If you are looking for a font named "CIDFont+F4" or similar, it is important to know that this is not a commercial font you can download. Instead, it is a technical placeholder or cidfontf4 font free download hot
: If you just need to print the document and don't need to edit the text, go to Print > Advanced and select "Print As Image" to bypass font rendering issues [7]. : Check the "Document Properties" (Ctrl+D in Acrobat)