When the creator saved the PDF, they forgot to check the "Embed Fonts" option. The PDF is now looking for a font on your local system that you do not own.
The document utilizes Asian character sets, and your PDF reader lacks the necessary language pack extension to render them. The Danger of Searching for "Free Font Download Links"
If you only need to view/print and not edit, use the "Flatten Transparency" tool in Adobe Illustrator to convert text into outlines, bypassing the need for the font file entirely. cid font f1 f2 f3 f4 free link download
Because these are , there is no official "CIDFont F1" file to download. If you are seeing an error that a CIDFont is missing, it means your PDF viewer cannot find the original font that the PDF creator intended to use. How to Fix "Missing CIDFont" Errors
Downloaded fonts are often corrupt and will not fix your PDF issue anyway. Safe Ways to Fix Missing CID Font Errors When the creator saved the PDF, they forgot
You do not need to hunt for external download links. You can fix the issue safely using official software tools.
stands for Character Identifier . It is a font format (CID-keyed fonts) primarily developed by Adobe for handling large character sets, most notably for East Asian languages (Chinese, Japanese, Korean). The Danger of Searching for "Free Font Download
: Because your computer doesn't know what "F1" is supposed to look like, it may display the text as dots, boxes, or garbled symbols. How to "Fix" Missing CID Fonts