Malicious PDF — malware analysis report

Static analysis result for SHA-256 c201917414c63f92…

MALICIOUS

PDF

42.8 KB Created: 2020-10-30 02:03:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 037188905ca9205ee2b047756c2c366c SHA-1: 5ed5bed8ee4df30fce17a12c4d880436d845a024 SHA-256: c201917414c63f922bc0003dd4628a9186827538d9abb596d81c1cf295a29aca
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL containing 'gettraff.ru'. The document body, though heavily obfuscated, contains a similar URL, suggesting a lure to download or view malicious content. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's a link farm hosted on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?keyword=real+estate+appraisal+report+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f8865cb3c2af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5f9b537b3ccd5.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tiladejonu.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/6061717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376600/normal_5f947299ec32e.pdfIn PDF document text
    • https://feleluxotikuko.weebly.com/uploads/1/3/4/3/134338959/borawed_sezaxul_vamemijodi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f89d69f619b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f872a46103d3.pdfIn PDF document text
    • https://wipaluxeko.weebly.com/uploads/1/3/4/3/134346688/10d8fc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6521/5642/files/58223705019.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/62042352273.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/volisevolidatovekikak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/717a8ae2-3104-4642-9570-9ba0fa50e9a1/food_chemistry_multiple_choice_quest.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D2 4972 bytes
SHA-256: 81a5995e0d6b1c5ddfd4ec3c2cd17aac92b0cf6ada70c5028844a5b6448fb830
font_01_sfnt_off000077a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A8 12192 bytes
SHA-256: 8de8bca31d8b746d802f3fc9feafa05e28165c3b5a679377180ffb380f1db056

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