It is unlikely DAP files from Microsoft Access can be directly converted to PDF. However, you could simply print the interactive report generated using the DAP file in a web browser on the page that is connected to the database.
Convert Microsoft Access data access page file to Adobe Portable document format.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert dap to pdf on Windows
A relational database management system from Microsoft Office
Convert from dap 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.