Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0095e53389682b…

MALICIOUS

PDF

71.5 KB Created: 2020-11-26 08:30:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7ac2ab6bc0f3bccee502dcbd30848311 SHA-1: 554b3a5c290507892a3c862213e4fef70a390b44 SHA-256: 4b0095e53389682b0a160f3f4480efa3a22a6a11ab8ea4914e1467e2745314c4
242 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a PDF link farm. The ML classifier also strongly indicated maliciousness. The document contains numerous embedded URLs, with one pointing to 'traffine.ru', a known malicious redirector. The presence of a download button lure and a callback lure further supports a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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.
  • 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://traffine.ru/123?utm_term=ventura+county+marriage+license+records In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377115/normal_5f94224699492.pdfIn PDF document text
    • https://lopuzidijunusi.weebly.com/uploads/1/3/4/3/134378181/131dc3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/cb91acb6-7d72-4c0b-8b76-8a86affe24a0/59739631756.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/85486677744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74b7fe59-87cb-4183-a380-4ec63b6f78a7/classic_wow_shadow_priest_bis_phase_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd170711-2e43-4a99-9d91-a661d5a6ff0c/symbol_for_dictatorship.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/pefuloziguxisubewetipaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaeee8f5-7d15-4e1c-82ea-6bf6aeca7796/goliwojukudeponemoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24bd6bca-91c2-4648-92c6-9da98a74c877/55026412029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3b4d81a-006c-4b60-a76b-a9477c5b1ba1/families_as_they_really_are_second_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12078eda-c63f-46bc-93db-014a0b20545b/tipaduwoxaduwava.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/the_lost_ship_story.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/cambios_psicologicos_de_la_mujer_embarazada.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_off0000cb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB04 5208 bytes
SHA-256: 5dfef2a4c6873dc9554cf5a6ae0b7ed0314181b1fd4ab612f325a2cd7cad7ea7
font_01_sfnt_off0000dca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA4 11148 bytes
SHA-256: fb7d7be07a1e1ab08bb157ee976eb601d8c0c794a4291023a6b563477fd2e98c
font_02_sfnt_off000102ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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