This is a placeholder name assigned by PDF creation software (like Adobe Acrobat or various print drivers) when the original font name is stripped or hidden.

A professional-grade CID font available for free via Adobe/Google. ⚠️ A Note on Safety

A method used to organize large character sets, common in Asian languages or complex OpenType fonts.

Since you cannot download "Cidfont-f4" directly, use these workarounds to fix your document: 1. Identify the Original Font Open the document in : Go to File > Properties . Click the Fonts tab.