If your PDF file is damaged, there are a few things you can do to try to repair it. Depending on the extent of the damage, you may be able to repair the file yourself or you may need to hire a professional.
First, try opening the PDF file in a different program. If you can view the file in another program, then the damage may not be too severe and you may be able to save the file as a new PDF.
If that doesn’t work, try converting the PDF to a different file format and then back to PDF again. This sometimes can repair damage that has been done to a PDF.
If the file is severely damaged, you may need to use special software to repair it. There are a few different options available online, search and choose one that fits your needs and budget.
Once you have repaired the PDF file, make sure to back it up in case something happens to the original file.