Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc15eef6090e3b75…

MALICIOUS

PDF

68.8 KB Created: 2020-11-26 03:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 33fef05424a720015476e618164c4adf SHA-1: dfcc9c02b0809aecd85c190b6e29e73287ed90b9 SHA-256: cc15eef6090e3b75596add4587b59bc5b2f25a7503cd37d8e1bb63079e4a2935
244 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm designed for SEO manipulation. One critical heuristic indicates that PDF links point to known malicious redirector infrastructure, specifically 'traffine.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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.
  • 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=human+geography+textbook+pdf+download In PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/2999037.pdfIn PDF document text
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/d5cfb8.pdfIn PDF document text
    • https://berajuvexoru.weebly.com/uploads/1/3/1/8/131860787/jobogevaxerap_pojolagutafola_welafuri.pdfIn PDF document text
    • https://fisegumatiwal.weebly.com/uploads/1/3/4/7/134722042/5100111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379370/normal_5faeec0d5df90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404524/normal_5fb7145b2293b.pdfIn PDF document text
    • https://xironudobavus.weebly.com/uploads/1/3/4/4/134461104/dede7c1489133.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/e92fdda0d88182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_5fbd49457dcc3.pdfIn PDF document text
    • https://bemogipe.weebly.com/uploads/1/3/4/3/134379528/59f2b9de36996a2.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://s3.amazonaws.com/xotomisen/bifiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/list_of_illinois_governors_in_jail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f90395-d5f3-4250-84a7-73ab827afce7/tevigopufuzesuv.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/browning_hi_power_mark_iii.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_off0000c182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC182 5540 bytes
SHA-256: 28693e9db59ec0c876ca36d8a3d83f1b03070fb232be0c49e4ea977669713b13
font_01_sfnt_off0000d439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD439 10692 bytes
SHA-256: b76cb270c012b5391aa7ac18f0e811ee1b6a51f2af84efe9caf2219230113c1d
font_02_sfnt_off0000f7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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