Copyright 2019 Albert Astals Cid
pdfattach - Portable Document Format (PDF) document embedded file creator (version 3.03) pdfattach [options] input-PDF-file file-to-attach output-PDF-file Pdfattach adds a new embedded file (attachment) to an existing Portable Document Format (PDF) file.

-replace Replace embedded file with same name (if it exists)

-v Print copyright and version information.

-h Print usage information. ( -help and --help are equivalent.)

0 No error.

1 Error opening input PDF file.

2 Error opening file to attach.

3 Output file already exists.

3 There is already an attached file with that name.

5 Error saving the output file.

The pdfattach software and documentation are copyright 2019 The Poppler developers pdfdetach (1), pdfimages (1), pdfinfo (1), pdftocairo (1), pdftohtml (1), pdftoppm (1), pdftops (1), pdftotext (1) pdfseparate (1), pdfsig (1), pdfunite (1)