Malicious PDF — malware analysis report

Static analysis result for SHA-256 409145bea425cff9…

MALICIOUS

PDF

41.0 KB Created: 2020-08-09 05:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8610b2468b513ce37a38c4669ab5c928 SHA-1: 0a733244f7d68c070f029c08f1164d3d8e07de6f SHA-256: 409145bea425cff90cdc950062a83aad9d7e0e6a551edfdbbc52a618d18a01a6
120 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=british+english+grammar+pdf', suggesting a lure to download a grammar PDF which redirects to malicious infrastructure. The presence of many external PDF links, including those hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the ultimate destination.

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.cc/pify?keyword=british+english+grammar+pdf
    • http://files.deleswaonthetrack.com/uploads/1/3/1/3/131379899/mogogagimelevutivome.pdf
    • http://files.sasquatchcanada.com/uploads/1/3/1/4/131437636/jumov.pdf
    • http://gedumal.cambriaseastar.com/uploads/1/3/1/3/131398140/8457868.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/volkswagen_jetta_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/11780130059.pdf
    • https://cdn.shopify.com/s/files/1/0432/8341/5204/files/76785719902.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/adjective_and_adverb_prepositional_phrases_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wojilezufaguxulidumusad.pdf
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/damomugetom.pdf
    • https://cdn.shopify.com/s/files/1/0439/2789/6219/files/ever_never_for_since_yet_already_just_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/1038546203.pdf
    • https://cdn.shopify.com/s/files/1/0432/6401/6539/files/69418924187.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0071/files/32917578850.pdf
    • https://cdn.shopify.com/s/files/1/0440/6339/1894/files/analysis_for_office_2._7.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0543/files/76316830545.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6948/files/bsff.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_off000061ea.bin
46eabafac4581ef916a4390354ce9e7a7350c328674515454ab36d402ca23097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EA 5504 bytes
font_01_sfnt_off0000747c.bin
831bf1863854631abf8e2e46ce253849c9ee450348154cdd2c2432e9ee05220e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x747C 10044 bytes

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