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https://issues.apache.org/jira/browse/TIKA-3332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17305547#comment-17305547
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Tilman Hausherr commented on TIKA-3332:
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The ExtractEmbeddedFiles.java example code in PDFBox is flawed because it
extracts only one level. The Tika code is aware of this flaw because there is a
comment
{code:java}
//If there is a need we could add a fully recursive search to find a
non-null
//Map<String, COSObjectable> that contains the doc info. {code}
Can you attach one of these files?
> Embedded files not extracted from PDF files with multilevel EmbeddedFiles tree
> ------------------------------------------------------------------------------
>
> Key: TIKA-3332
> URL: https://issues.apache.org/jira/browse/TIKA-3332
> Project: Tika
> Issue Type: Bug
> Affects Versions: 1.25
> Reporter: Ross Johnson
> Priority: Major
> Attachments: image-2021-03-20-13-36-48-525.png
>
>
> I have come across some portfolio PDFs that have many attachments / embedded
> files, but Tika is not detecting or extracting them as it does with some
> other portfolio PDFs. The issue may be that these files have a multilevel
> EmbeddedFiles name tree that is not being handled properly by PDFBox.
> Here is the EmbeddedFiles structure of one of the PDF portfolios in question.
> Notice that the root EmbeddedFiles dictionary has a Kids array that only
> consists of intermediate dictionaries, with the actual Names array being one
> more level down.
> !image-2021-03-20-13-36-48-525.png!
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