[TIKA-3332] Embedded files not extracted from PDF files with multilevel EmbeddedFiles tree

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.25
• Fix Version/s: 1.26
• Assignee: Unassigned
• Reporter: Ross Johnson
• Created: 20/Mar/21 17:41
• Updated: 20/Oct/21 14:45
• Resolved: 22/Mar/21 19:25

Description

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.

Issue Links

• is related to: PDFBOX-5138 Embedded files not extracted from PDF files with multilevel EmbeddedFiles tree
• relates to: TIKA-3579 Add detection of PDF portfolios