When a PDF contains text using a Type 1 font that is not embedded (or is partially embedded), the PDF renderer (Adobe Acrobat, Evince, Preview) will create a synthetic font object to display the text. That synthetic object is named using a hexadecimal timestamp and internal parameters. is a textbook example of an Adobe PDF synthetic font name —derived from the font descriptor’s "FontBBox" and "StdVW" (standard vertical width) values.
If you have found this string in your font manager, a CAD program, or a corrupted document, you are likely asking three questions: What is it? Why is it here? And can I delete it?
