Malicious PDF — malware analysis report

Static analysis result for SHA-256 255385b5c50be3e5…

MALICIOUS

PDF

41.2 KB Created: 2020-08-22 19:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a3f767f3a08c910b4fe4593324f34ba SHA-1: 6a78cc661980516f7edc389e8c6f4b89ab9f12cc SHA-256: 255385b5c50be3e5a0c33083a457400f079862cf00a017c1a1e300d274cd7039
120 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a link farm, indicating a social engineering attempt to lure users to malicious content. The primary malicious URL identified is https://ttraff.com/pify?keyword=visiting+card+format+photoshop. The document body, though heavily obfuscated, contains references to the lure and the malicious URLs.

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.com/pify?keyword=visiting+card+format+photoshop
    • http://files.hrhgwenyfar.com/uploads/1/3/0/9/130969862/1d27675e339254.pdf
    • http://files.zebradental.co.uk/uploads/1/3/1/4/131437311/7002933.pdf
    • http://files.rockinghamcountyncdems.com/uploads/1/3/1/4/131437967/9503897.pdf
    • http://wefijefuf.bereartc.org/uploads/1/3/2/3/132302978/1221230.pdf
    • http://files.sbcusd-career-pathways.com/uploads/1/3/1/6/131637257/7720979.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifivejeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/1268/4967/files/diagramming_sentences_practice_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/8145/0151/files/vulizazuta.pdf
    • https://cdn.shopify.com/s/files/1/0433/3918/6344/files/automatic_parking_brake_system.pdf
    • https://cdn.shopify.com/s/files/1/0440/5306/9974/files/mastering_physics_solution.pdf
    • https://cdn.shopify.com/s/files/1/0433/8820/7254/files/dawn_of_war_soulstorm_trainer.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0591/files/kitomapixoxoxagodam.pdf
    • https://cdn.shopify.com/s/files/1/0436/8944/3483/files/heteronyms_worksheets_for_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/9721/8458/files/79213303925.pdf
    • https://cdn.shopify.com/s/files/1/0437/6766/0706/files/any_video_by_link_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1153/files/67041511218.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8298/files/lolabawe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/porawaveruwaju.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_off0000636b.bin
7cdf1ffae6e63a4fac33cbef51b3c616d5f466614f5c7fb593683e23269a3d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636B 5504 bytes
font_01_sfnt_off000075f3.bin
c788385cd0757dcc8d398999f00740e7e9bc2d9849b25bc5a91ba31326146778		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F3 9852 bytes

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