Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae10b2431cd09c6…

MALICIOUS

PDF

87.2 KB Created: 2020-11-27 16:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 903f4538cef68d1c4882f8262f8dba43 SHA-1: eb497dadbf5d360e02079eb1f5b5eb4a8d8b5a93 SHA-256: 8ae10b2431cd09c6faa9c178f8db7914c4855147e8845a70c83f23f17c5a6ef0
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting or redirectors, indicating a link farm or phishing attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'traffine.ru', which is known malicious infrastructure. While no scripts were extracted, the structure and embedded URLs strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=book+the+magic+mountain In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388067/normal_5fb76b47ea3ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483836/normal_5fa9039bed25b.pdfIn PDF document text
    • https://rezivunafotete.weebly.com/uploads/1/3/4/3/134354631/e91a6c40b83b8db.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/fewuwefuvufu.pdfIn PDF document text
    • https://dunojezeb.weebly.com/uploads/1/3/4/5/134586234/kibuk.pdfIn PDF document text
    • https://gudemulu.weebly.com/uploads/1/3/4/3/134387893/rinelezukuz.pdfIn PDF document text
    • https://rogubadivuna.weebly.com/uploads/1/3/4/3/134337887/bedisijoboduduj_kolalelotub_roliwekab.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/vuzufexarevima/african_mask_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/12347618144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/857539d5-5649-4c11-8395-4ea1b043d52c/61951752450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a7f942-2a5d-48d2-8a67-256de2b86016/puvomupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed1db68e-e5f6-4b63-9450-ea21945bac7a/mexugigebobabinijovebod.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/fifa_mobile_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc500d2-1dba-479f-9dc1-4543a5574adf/i_got_rhythm_sheet_music.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_off00011743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11743 5020 bytes
SHA-256: 9ddd81903d9077c01c50aad19fd3f0dc76065254742dfbc2d1740562a35bc5f2
font_01_sfnt_off0001283b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283B 12348 bytes
SHA-256: 842cd6cee360ca637aa1f7f9f3b09b56e00a0414342adee3b062f152c599bb7c

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