Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ad57c0a67c7a0d…

MALICIOUS

PDF

69.9 KB Created: 2020-12-26 23:00:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 51a1f05caa3548687982646f707788a5 SHA-1: b40034e37a783bfeb7c9dc42d069ad96c49a6e7a SHA-256: d3ad57c0a67c7a0d85fd359e185df9039e8a681d5da5f4bdbcc9106605e45995
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagging it as a redirector link farm. The document contains numerous embedded URLs pointing to potentially malicious or disposable hosting sites, including a critical redirector link to 'ggtraff.ru'. The presence of many links suggests an attempt to manipulate search engine results or direct users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://ggtraff.ru/aws?utm_term=counter+strike+source++free+warzone In PDF document text
    • https://cdn.sqhk.co/larovejadeb/GidqgjL/bupixoxebodenokom.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/6452702.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/juterunarifidoxojek.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/wiwodepogurojofepotu.pdfIn PDF document text
    • https://zobutetagi.weebly.com/uploads/1/3/4/2/134265803/5138251.pdfIn PDF document text
    • https://xexemisekugo.weebly.com/uploads/1/3/4/6/134679242/nonuv_nutaxan_kuselarujuwe_xifuxipagi.pdfIn PDF document text
    • https://cdn.sqhk.co/tifesiwafo/hggBjam/cartoon_craft_apk_3._50.pdfIn PDF document text
    • https://nipobajomofak.weebly.com/uploads/1/3/4/6/134641158/zirepus-satananubo-mevegofos-komumivene.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/348411c9-e99a-4e7c-bb74-e2f8a9d448e5/phet_simulation_bending_light.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/free_letter_c_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/jexomaxemumoxawutego.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_off0000d734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD734 4952 bytes
SHA-256: 7e30c00edf43bd28a94726a1ddb63dcfe00839518cc2212d69b9f6ee8639afc4
font_01_sfnt_off0000e83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83C 10016 bytes
SHA-256: 2bfd7745a481539147170be291638fbc693d9edac24dabf4c0355b03def211b4

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