Malicious PDF — malware analysis report

Static analysis result for SHA-256 734413491b62c863…

MALICIOUS

PDF

80.1 KB Created: 2020-12-22 16:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8452ddcbe0501482f1b509c4d852cc1f SHA-1: b77f0afdd724a068ba082302518e20e3b86734e3 SHA-256: 734413491b62c863aaa86537606e22b899f4be597b683217257bef77580e0efb
244 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, and is detected by ClamAV as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that redirect to potentially malicious sites, including a critical redirector link to 'gettraff.ru'. The document body, though heavily obfuscated, appears to contain keywords related to awards and nominees, likely as a lure to disguise the malicious intent of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/strik?utm_term=alberta+country+music+awards+2020+nominees In PDF document text
    • https://xizirogubo.weebly.com/uploads/1/3/0/7/130776043/098786a70.pdfIn PDF document text
    • https://laratenin.weebly.com/uploads/1/3/2/8/132816160/2621688.pdfIn PDF document text
    • https://zedumolubu.weebly.com/uploads/1/3/4/8/134862080/mitojugirasow.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/gizamesegiko-seduti-sawuxogisok-xuxumuwa.pdfIn PDF document text
    • https://dupasaku.weebly.com/uploads/1/3/4/2/134235895/5187298.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/cells_word_search_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cb459cd-bd55-416a-988c-4aa902a09a1e/34914351950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff761795-6970-448d-a000-101d7f453f6d/fividesusezuxivifunefibim.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/kanuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/794f2bfa-a466-47ea-90c1-29652f0b4996/72324469532.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/ball_gown_long_sleeve_formal_dresses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba3c075a-bd81-496e-b5d5-47a521d1cbfb/lijiperejuvonisenamuval.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851ca975-4b08-42d8-87cf-0bcf10be0a06/jafulifukevovepominupopez.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a81ee5c7695ca9a6fa19/t/5fc3af897acac6192a30f254/1606659978510/xonugapasenutuwufojex.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4da1c2bbd7406581fdd5e/t/5fd16175ebc7ce75e8a459c1/1607557496078/free_online_virus_scanning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fafcbd5e-a281-4645-b8c8-564c34e35686/what_does_esol_stand_for_in_education.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_off0000f7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D7 5684 bytes
SHA-256: 5578a77599c5fae3d31327993fb02d60c8b824529bbf0afd858c7263d0b39914
font_01_sfnt_off00010b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B25 11996 bytes
SHA-256: 9248c92db72b1e0b67c6a09f1bb03acdab26ac68e02112dfa185e8559de46c0a