Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e432b6d442c54e…

MALICIOUS

PDF

45.0 KB Created: 2020-08-10 11:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec7499e9c918a9d0bc795e4a57868359 SHA-1: b904cde2e4fcf21c8122f2980c9eb714944500b5 SHA-256: 80e432b6d442c54ef0dda433b228a5d85bad6114f0a778c860132634877aca06
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to what appears to be a link farm designed to host other PDFs. One prominent link, https://ttraff.ru/pify?keyword=google+company+introduction+pdf, is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=google+company+introduction+pdf
    • http://files.mhdtechcorp.com/uploads/1/3/1/4/131483955/bujixowijavol_roxejirevad.pdf
    • http://files.redwallstudios.net/uploads/1/3/0/7/130739654/gesakeku.pdf
    • http://files.ironhawkelevator.com/uploads/1/3/1/4/131410818/lisuwanezajisagaj.pdf
    • http://files.almutalbrecht.com/uploads/1/3/1/4/131483440/1025126.pdf
    • http://files.dianeetatumwriter.com/uploads/1/3/2/6/132680976/pavopudimigubopewimi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6583/4649/files/bakersfield_college_campus_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7095/files/kevatofosozemezogekuzekak.pdf
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/63784500994.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/brendon_burchard_high_performance_planner.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/sql_interview_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/hcl_technical_support_interview_questions_and_answers_for_freshers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/bestiario_ita.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98029452840.pdf
    • https://cdn.shopify.com/s/files/1/0429/0412/5599/files/xodupelo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/rojamolojuwomo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/microsoft_azure_machine_learning_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/jagamiwokoborobu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/jolojukek.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070a7.bin
6baf3913c497e6c3592fc4b4eece41a14615ca3569d725bc879afe69fd3766d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A7 5432 bytes
font_01_sfnt_off0000831b.bin
b5e6d2dffa2e33f73946ea708961115c0611bbeafa6cade26388b74b5b0bfe9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x831B 10520 bytes

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