Remove embedded canvas from first page of PDF

Sometimes PDFs store too much information. And sometimes that information causes them to not play nice with Ghostscript when bursting and transforming pages. I've been left with awkward white space on too many occasions and finally set out to remove that typically unseen space.

mkdir fixed; \
convert -trim +repage infile.pdf[0] cover.pdf: \
pdftk infile.pdf cat 2-end output outfile.pdf; \
pdftk "cover.pdf" "outfile.pdf" cat output "fixed/infile.pdf";
rm cover.pdf outfile.pdf;