Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b49e4dafe407e93…

MALICIOUS

PDF

37.0 KB Created: 2020-09-17 18:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8330529dc5819d01f93ca282044fd9a SHA-1: 304789037194d3b9020a28771bd234c415ac9d7c SHA-256: 7b49e4dafe407e93ccee37da6037e74d3698c29aaba4dfc0cdb49bb9f705272d
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to external websites. One critical heuristic, PDF_MALICIOUS_REDIRECTOR_LINK, specifically flags a link to 'ttraff.me' as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that align with the heuristic findings, suggesting a campaign to drive traffic to malicious or SEO-poisoned sites.

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.me/wix?keyword=celebration+of+discipline+workbook+pdf
    • http://rofevora.cavecanemcolectioni.com/uploads/1/3/1/8/131857314/0b77dc722.pdf
    • http://xerefiwas.brentkinworthy.com/uploads/1/3/0/8/130813448/3476200.pdf
    • http://kewenaj.masteryourchess.com/uploads/1/3/0/7/130739777/mopis-zamegedoma.pdf
    • https://ab9fe7a2-de02-4609-b569-8d0f6c2be3b8.filesusr.com/ugd/eeb7bd_1148646ff24543b4b687c6d14149491b.pdf?index=true
    • https://4a16b753-7dce-4b16-a989-f23475e0bc4d.filesusr.com/ugd/834936_b5a834f2400e44719ed01f1998977c3b.pdf?index=true
    • https://eaee6b7d-e665-4688-9a7b-af6a3de5b2a8.filesusr.com/ugd/b48b60_0090a2314e5c44f4922cf3e36e94dd03.pdf?index=true
    • https://bbf4eb81-4f42-4588-9fce-4ed9a301c6f3.filesusr.com/ugd/430cb2_b0cc360a7e004608941d203de4233f1d.pdf?index=true
    • https://68336feb-bef0-494d-a256-71716ba4a136.filesusr.com/ugd/35ddae_e25353a1cfdb4e56a6fac2bd697b90a2.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0438/5544/6176/files/capital_expenditure_budget_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/ebook_kindle_formato_epub.pdf
    • https://cdn.shopify.com/s/files/1/0440/3852/0997/files/89195595443.pdf
    • https://cdn.shopify.com/s/files/1/0432/1650/2939/files/optical_isomerism_in_coordination_complexes.pdf
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/bujuz.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_off000053ac.bin
40a1d8bcca908d97defbf1caf2b9ad0c76afcde4520ee6b29d1ef3e256e7d447
pdf-font-stream PDF embedded font (sfnt) at offset 0x53AC 5352 bytes
font_01_sfnt_off000065f7.bin
c8a9c4aca19d4015c0b999d35e729f5da21a32e28f5485a80710c7821ff31e85
pdf-font-stream PDF embedded font (sfnt) at offset 0x65F7 9784 bytes