If the font appears within a PDF, run:
: While these names are random, in many standard documents, they map to common system fonts: F1 : Often Arial Bold or Times New Roman Regular . F2 : Often Arial Regular or Times New Roman Bold .
On older macOS systems (Classic OS 9 or early OS X), data fork fonts (DFONT) sometimes exposed internal resources as f1 , f2 , etc. A corrupt DFONT containing CID resources might list its suite as:
"Cidfont-f1" through "F6" are not real fonts you can download; they are created when a PDF fails to properly embed its original fonts.
If you are receiving an error message regarding these fonts or cannot edit a file because of them, try the following solutions: The "Print to PDF" trick: Open the file in a browser or basic PDF viewer like Mac Preview and choose Export as PDF Print to PDF
That string might look like cryptic code, but it is actually a glimpse into the "hidden plumbing"
