The software that created the PDF failed to include the full font data. Encoding Issues:
If a document uses CID Font F1, you might find that you cannot use the "Find" (Ctrl+F) function to locate specific words because the underlying character codes are no longer standard. Cid Font F1 Normal
The closest vector approximation of the Cid/F1 Normal aesthetic is a typeface simply called or "Formula1 Display." Many torrent and font archive sites host these files. However, if you use these for commercial projects (T-shirts, posters, monetized YouTube thumbnails), you risk a cease-and-desist from the F1 legal team. The software that created the PDF failed to
Therefore, when a system reports using "CID Font F1 Normal," it is essentially saying: "I am using the primary font resource assigned to slot #1 in this document, and I am using the standard, un-modified weight and posture." However, if you use these for commercial projects
First, we must address a technical nuance:
Are you seeing this font name in a like AutoCAD or Adobe Illustrator, or is it appearing on a printed page ?
One typographer in Prague claims that if you type the word RESET in Cid Font F1 Normal at size 72, the characters slowly rearrange themselves into a date: 2041-03-17.