Ghostscript is an interpreter for the PostScript® language and PDF files, and it can be used to handle all nitty-gritty problems with respect to PDFs.
PDF cannot be embedded into Latex
I rely heavily on Draw.io (Diagrams.net) to create diagrams and export them as PDFs for my LATEX projects. If you’ve ever had LATEX fail to recognize certain objects in those exported PDFs, Ghostscript is the robust solution that can save your day.
gs -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=out.pdf your_input.pdf