If you are using Adobe Illustrator, you can import the PDF and use the "Transparency Flattener" to convert the problematic text into outlines, bypassing the need for the font file entirely. PDF Re-export:
Finding a specific font like Cidfont F1-Normal can be a bit of a hunt, as it is often a system-specific or PostScript font typically embedded in PDFs rather than a standard commercial typeface you’d find on a designer’s site. Cidfont F1-normal Font-- Free Download
Instead of downloading a malicious "Cidfont" file, you simply need to make your computer recognize standard system fonts or clean up the broken PDF data structure. Safe and Proven Fixes for the Missing Font Error If you are using Adobe Illustrator, you can