Missing part of the image when converted from pdf to jpg

[Carter J]

Hi All,

When we are trying to convert a pdf to jpg, the red diagonal bars which present on inputPDF are missing on the output jpg.

Commands tried:
convert -layers merge InputPDF.pdf Output.jpg
convert InputPDF.pdf Output.jpg

We received this pdf from someone else and we don't know how the pdf is made up of.

ImageMagick Version: ImageMagick 6.8.8-7 Q16 x64

GhostScript Version: 9.10


Links for inputPDF and output jpg file:
inputPDF.pdf: https://www.dropbox.com/s/qfcogj3tx5pvets/InputPDF.pdf

output.jpg https://www.dropbox.com/s/qgtqr0j86nblh2s/Output.jpg

[snibgo]

The red bars are spotcolors, using specific inks instead of any combination of cyan, yellow, magenta and black.

IM doesn't process spotcolors. As far as I know, neither does Ghostscript.