Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa2ec572b0d0ef4…

MALICIOUS

PDF

45.4 KB Created: 2020-10-19 04:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: dcc1d3bfb4031088b272dab5705cca6d SHA-1: 7ffc038e21039c4845a9184d9a451d5376d3453e SHA-256: 7fa2ec572b0d0ef4f9b09e6c19a17fb8510dd82c467a3434685b3c1c6aaff8de
184 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a link to known malicious redirector infrastructure. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external content, some of which are hosted on disposable domains. The primary malicious URL identified is https://ttraff.cc/123?keyword=protection+cathodique+par+courant+impos%25C3%25A9+pdf, which is likely used to distribute further malicious content or engage in SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ttraff.cc/123?keyword=protection+cathodique+par+courant+impos%25C3%25A9+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f87d5d866e08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_5f8ac211f1143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5f8a5eef2f83b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f888b057cd2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f8759be5da3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f8cc18331543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f8732db3bd21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377662/normal_5f8a1a040fa5a.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/9083364.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/838398.pdfIn PDF document text
    • https://nurekagenarufab.weebly.com/uploads/1/3/1/6/131636906/lakopapinigilobu.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/bivawewavegujoxu.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/5452898.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/a5f3ba84-0560-4143-b480-2c782dceb25a/suvewatefapeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0152/0023/files/addams_family_game_grandfather_clock.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/jafimileku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bfcb448-628c-4898-824b-bd44e205a8b5/a_rose_for_emily_study_guide_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e28cdcf6-c23e-4c0b-af55-409098a883bd/guion_largo_y_corto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab3e4ef-cdf8-4f22-9803-dd46b78d15dd/98117715781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6875f192-e344-4c04-a57b-797a421b6f8b/65102184493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a8c9055-4a41-456f-96b2-c4e14986411b/xasorufevered.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_off000064d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D3 5632 bytes
SHA-256: 53485a779fde817114cc03360234203d9be07b4fa3e22a0fda7c293186806320
font_01_sfnt_off0000777e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x777E 15580 bytes
SHA-256: 82dba0e7a8c322b78b207d8424c4b786bb889c822109025e372ac95c9f97452d