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https://issues.apache.org/jira/browse/PDFBOX-6288?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18141824#comment-18141824
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Michael Klink commented on PDFBOX-6288:
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[~Schmidor],
can you disclose which tool (or tool chain) created the PDF in question, so
PDFBox development can understand the impact of (not) fixing this PDF error?
IMO, though, PDFBox shouldn't apply such PDF repairs automatically but only on
request.
> Invalid ToUnicode CMap
> ----------------------
>
> Key: PDFBOX-6288
> URL: https://issues.apache.org/jira/browse/PDFBOX-6288
> Project: PDFBox
> Issue Type: Bug
> Reporter: Oliver Schmidtmer
> Priority: Major
> Attachments: MalformedToUnicodeCMap.pdf
>
>
> A problematic PDF file contains a "ToUnicode CMap" that uses "begincidrange"
> instead of "beginbfchar" or "beginbfrange".
> Since the CMap is ignored in this case, the wrong glyphs are used during
> rendering. Because the file displays correctly in Acrobat, a workaround might
> be justified.
> The attached PDF file is a generated example, as the original contains
> sensitive data. I used Copilot for the analysis and to create a potential
> patch:
> https://github.com/Schmidor/pdfbox/commit/425e83caaa28c66e6e4438c7818f0eb0a448fae9
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