"CID Font F1 Normal" is generally a technical identifier rather than a creative typeface you can use for designing logos or typing documents. If you encounter it, it usually signals that a PDF is using a subsetted font or an alias for a standard font.
Are you experiencing this error in a like Adobe Acrobat or when trying to view a document in a web browser? CID+ Fonts - Adobe Community Cid Font F1 Normal Free Download
