Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c2bbabb2b75295…

MALICIOUS

PDF

38.9 KB Created: 2020-08-23 14:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5da50b774413d090bfb078059f7e3859 SHA-1: 8e191f18ee6a691e7a7db72f11fb74ecbea1ba9e SHA-256: a1c2bbabb2b75295ffdc9e6c0b3c9d71b69cc6f05011693c4c58232d893d25ea
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically a URL related to 'edgehill college bideford uniform'. This suggests a phishing or scam attempt to lure users to a malicious site. The file also contains a large number of external PDF links, many hosted on Shopify, which is characteristic of SEO link farm abuse to obscure malicious activity. No scripts were extracted, but the primary malicious indicator is the redirector link.

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=edgehill+college+bideford+uniform
    • http://nozosesej.mindwest.net/uploads/1/3/2/6/132695351/bamuweji.pdf
    • http://files.hedongreenprint.co.uk/uploads/1/3/1/3/131380767/c5cab39d57ceb2.pdf
    • http://jasonogut.mandarin4u-sd.com/uploads/1/3/1/4/131407558/befukegobafox_dunixidufo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0429/6348/files/barrett_s_esophagus_diet_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6160/files/libro_de_auditoria_contable.pdf
    • https://cdn.shopify.com/s/files/1/0428/7424/1187/files/wanutil.pdf
    • https://cdn.shopify.com/s/files/1/0429/2473/6678/files/ncdpi_licensure_renewal.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/antique_jewellery_designs_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0430/7487/9642/files/annadurai_movie_songs_kuttyweb.pdf
    • https://cdn.shopify.com/s/files/1/0433/4570/7162/files/65526565474.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_off00005ba0.bin
ce809c9e2a9e5e0cc2ae73184890ad8ff23444a1fcfb6d48982834d7c47b13da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA0 5144 bytes
font_01_sfnt_off00006cf0.bin
e4b1cfbbe8d81f15bc97e2d44d829ea1e5529abd4f3b3aab4610087deefb448e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF0 10020 bytes

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