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Check the document's properties ( Ctrl + D or Cmd + D > Fonts tab). It may list the "Actual Font" used alongside the CIDFont alias, which can tell you which real font you actually need to install. Impossible fonts to be found / Fontes impossíveis de achar cid font f1 f2 f3 f4 f5 hot free download
: These are temporary names created by PDF-exporting software (like InDesign or Word) when it fails to properly embed the original font. Search Google Scholar or IEEE Xplore for: Check