How to remove pages from a PDF while leaving the document otherwise unchanged

I have a PDF book that I want to remove a few pages from to reduce the file size. My normal solution to this didn't work, and when I tried others they introduced new problems: - I usually use PDF Arranger for this, which is normally a great tool. However, when I try it on this particular document I get an error I've never seen before (invalid literal for int() with base 8: b'228') - I can use pdftk to remove the pages, but the file size of the resultant document is more than double that of the original, which defeats the purpose of removing the pages in the first place - I can also use the Print to File command to remove the correct pages, but then I get a huge margin around the pages, with a smaller font and more whitespace, making the file harder to read As you can see, it's surprisingly tricky to remove pages while otherwise leaving the document the same. Any advice on other solutions, or figuring out what's going on with these, would be much apreciated!