Linked PDF with passthrough and specific page box settings gives mangled output in PDF/X-4

[Bauke]

This linked image (a PDF made in presumably Adobe Illustrator), with page box set to ArtBox, Minimum Content or Maximum Content and passthrough enabled, gets mangled when exporting the document using the PDF/X-4 preset.

With PDF/X-1 or any digital PDF preset, or the page box set to anything else, the problem doesn't occur.

I attached a package with the document, including the linked image and the exported PDF.

bug.zip

[Pauls]

The PDF has  a trimbox and artbox specified which is not quite in line with the PDF X4 spec.

[Pauls]

I've raised an issue to see if it is something we could handle

[Bauke]

Thanks @Pauls! I'm not very much into the PDF spec so I'm not sure I really get where the problem lies, but to be honest I kind of expected Publisher to not touch the source PDF in any way on export because I selected Passthrough. I also thought the page box was just a convenient way to crop the image. Did I misunderstand those things?

Thanks again!
Bauke