Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea025ed924c84656…

MALICIOUS

PDF

32.8 KB Created: 2020-08-26 03:32:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af11872957adf8dd32dff036c05ea240 SHA-1: a9fc660a40745a8d16338818b0fcb5d3239fe7bf SHA-256: ea025ed924c846568896e1da93b3ea04cca4f52814695c2e612e1e1617a9425d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, a technique often used to redirect users to malicious websites. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=metafisica+aristoteles+garcia+yebra+pdf'. Another heuristic flagged the PDF as a link farm, with many links pointing to other PDF files, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=metafisica+aristoteles+garcia+yebra+pdf
    • http://files.livbeauty.net/uploads/1/3/1/3/131380788/8401988.pdf
    • http://devijed.shareinhisloveministries.com/uploads/1/3/2/7/132712207/8796320.pdf
    • http://kalap.myadminonthego.com/uploads/1/3/1/4/131437594/kasonobiva-duzazer-vibarupuwerode.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6049/files/dijoto.pdf
    • https://cdn.shopify.com/s/files/1/0437/1428/1625/files/adobe_reader_dc_vs_11.pdf
    • https://cdn.shopify.com/s/files/1/0438/3942/2624/files/webex_room_kit_plus_ordering_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/5747/0872/files/nba_teams_alphabetical_order.pdf
    • https://cdn.shopify.com/s/files/1/0463/5194/1793/files/tutorial_of_ms_office_2010_in.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4870/files/99642517444.pdf
    • https://cdn.shopify.com/s/files/1/0433/7673/8462/files/descriptive_research_design_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/5472/6310/files/sha1_hash_file_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/xabojizopijinojebil.pdf
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/sokovitewufetowoguzu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000435c.bin
f837237320af295948ea17d243cd8450ef512a650ff08426e547757e9f88cfd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x435C 5568 bytes
font_01_sfnt_off0000565c.bin
3cf3caa5c901b879289df9a75c2fa4305f98cd22da5e3c9e487541a3cea13220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x565C 9428 bytes

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