Available as rpm at https://copr.fedorainfracloud.org/coprs/cygn/pdfshrink/

Usage: pdfshrink [-sepP | --screen --ebook --printer --prepress] infile [outfile]

A simple script to reduce the size of a pdf file, by optimizations offered by ghostscript. Four different levels are available, which will mainly affect the dpi of included images:

• screen 72 dpi
• ebook 150 dpi
• printer: 300 dpi
• prepress 300 dpi + colors

It doesn't give smaller files in every case, but often does, even when there are no images nor graphics. If an image appears several times in the original file the reduction can be quite substantial. The default is screen (worst quality, best reduction). Metadata is kept and it produces a PDF1.4 compatible file. If outfile is not specified, it will be infile.shrink.pdf.