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[Gabriel Staples <ercaguy@xxxxxxxxx>]

Related:

"In general, Acrobat and Reader will show a negative image when the
image data indicates that it needs to be inverted. When you have images
that are compressed with the CCITTG4 algorithm, there is a flag in the
image data that indicates if a logical "1" indicates black or white. The
software that created this document must have used the wrong value for
this flag. I've seen similar effects also with certain CMYK JPEG images
(but it's been years since I encountered the last one of those) where
the PDF generator created corrupt data."

Source: https://answers.acrobatusers.com/Why-does-the-PDF-show-as-a
-reversed-image-q132625.aspx

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https://bugs.launchpad.net/bugs/134313

Title:
  pdfimages produces inverted image for black & white image

Status in gimp package in Ubuntu:
  Fix Released
Status in poppler package in Ubuntu:
  Fix Released
Status in xpdf package in Ubuntu:
  Invalid

Bug description:
  Binary package hint: xpdf

  For any PDF with black & white images, pdfimages extracts them with
  the colours reversed

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