Because these are internal system aliases, finding a direct "free download" for them is generally impossible, as "CIDFont+F1" in one PDF might be Arial, while in another it could be Tahoma or Myriad Pro. Understanding CIDFont Placeholders When a PDF is exported, the software may use CID (Character ID)
: If you just need the document to look right and don't need to edit the words, you can "Flatten Transparency" in Illustrator to convert the text into shapes (outlines). Cid Font F1 F2 F3 F4 F5 Free Download