Malicious PDF — malware analysis report

Static analysis result for SHA-256 96085e03bcdf61c2…

MALICIOUS

PDF

97.7 KB Created: 2020-12-18 14:19:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c600217c0a7cb37b97a037292609e05b SHA-1: 633ba407947bf2ecc6488ec1b8e40899546d4c23 SHA-256: 96085e03bcdf61c220d88233dcbabc3bfb042b98e98dd996a801d8504b75d61e
174 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. The ML classifier also strongly flagged the PDF as malicious. Although no explicit script was extracted, the presence of a malicious URL within a PDF, combined with a callback phishing lure heuristic, suggests an attempt to redirect the user to a malicious site for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffine.ru/aws?utm_term=beamforming+meaning+in+tamil In PDF document text
    • https://cdn-cms.f-static.net/uploads/4453720/normal_5fdb2d31bd27c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472774/normal_5fa9d9b1af313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446634/normal_5fd17133c5076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_5fa5b8fc06e08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5f8dd25cd4a69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406216/normal_5fcc1ab6e0483.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc7998c717a0f60c4044aef/t/5fd6554cffab5d3c56f85d0d/1607882060684/decimal_word_problems_multiplication_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54630e9fc3622d53ece95/t/5fcd69c183d2ac65cc2725e4/1607297473027/31424506999.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/1658711885.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/free_cursive_handwriting_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/belmont_primary_school_chiswick_ofsted_report.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CB 6964 bytes
SHA-256: 8ae9f1c788df13872540eb1a3c74dc8ca48128b19ca5e1cf93bbb820fdda3bc2
font_01_sfnt_off00014089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14089 4960 bytes
SHA-256: 08394364647a94b9915ada02b98be03e68cd757f1e676953557734476ea2693e
font_02_sfnt_off00015156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15156 12020 bytes
SHA-256: df63be60978a23d8c04e44728b293a77356486d921c645f8bd9a3a5610cae780

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