It might be possible that PFB files can be exported to PDF for viewing, but given the nature of both formats, the result might not be useable.
Convert Type 1 PostScript font to Adobe Portable document format.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert pfb to pdf on Windows
Set of utilities for SWF conversion and other operations
Convert from pfb file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.