Odttf

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ODTTF is an embedded font file type used in Microsoft's XML Paper Specification (XPS) and Microsoft Office 2007 formats. The file type refers to an obfuscated subsetted font based on the fonts used in the original document.

The files can be extracted from the doc by renaming the files to ZIP, and the archive can be browsed and extracted (e.g.: rename cv.docx -> cv.zip)

Microsoft assigned MIME type is application/vnd.ms-package.obfuscated-opentype.

According source code of Okular (see fuction parseGUID() and method XpsFile::loadFontByName())[1], first 32 bytes of font file are encoded using font file name (GUID string) and list of 32 magic numbers.