If you're using , do not open the file directly. Instead, create a new document and Place the PDF into it. Then, use the Transparency Flattener to convert the text to outlines, which bypasses the need for the missing font. Manual Font Substitution:
(e.g., from Adobe's CID-keyed fonts, or a technical manual)? Cid Font F1 Normal
Users often see this name when a PDF displays text as garbled characters, dots, or "bad widths". To resolve this: CIDFont+F1 issue - Adobe Community If you're using , do not open the file directly
: In many standard exports, CIDFont+F1 maps to Arial Bold or Times New Roman Regular , while F2 often maps to the standard or bold counterpart. CIDFont+F1 issue - Adobe Community Manual Font Substitution: (e
When exporting a PDF from Word, InDesign, or specialty software, always ensure the "Embed All Fonts" or "Subset Fonts" option is checked in your Publishing Options .
On a Mac, opening the file in Preview and then selecting Export as PDF can sometimes "re-bake" the fonts and fix the encoding issues for other readers. Which font type? - Adobe Community