Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e346e89268b7a6…

MALICIOUS

PDF

43.3 KB Created: 2020-10-11 15:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b1e0586945a98b27b2df78d71e012fd5 SHA-1: d005664e63f5ca45ff30f3a769978686ccc80c40 SHA-256: 27e346e89268b7a69a7167510939f8ea65941a9ff088381d2ae84ae5fab9ad9a
184 Risk Score

Malware Insights

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

This PDF document acts as a link farm, directing users to multiple external websites, including a known malicious redirector at 'https://cctraff.ru/strik?keyword=pixel+car+racing+pc+download'. The document's content and structure strongly suggest it is designed to drive traffic to potentially malicious or scam-related sites, masquerading as a download link for a game. The ML classifier also strongly indicated maliciousness.

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://cctraff.ru/strik?keyword=pixel+car+racing+pc+download In PDF document text
    • http://zivuvi.robcalamedia.com/uploads/1/3/0/8/130874368/lenenexog.pdfIn PDF document text
    • http://files.global-migration-of-african-cuisine.com/uploads/1/3/0/8/130813588/bimopejup.pdfIn PDF document text
    • http://gafov.metimeforthemind.com/uploads/1/3/0/8/130813786/dugami.pdfIn PDF document text
    • http://gumovikug.bobwatkinsrealty.com/uploads/1/3/1/6/131607163/5556879.pdfIn PDF document text
    • http://bofaxarop.brickceramics.com/uploads/1/3/1/8/131856462/gefapajegob.pdfIn PDF document text
    • http://tofir.bluequillbooks.com/uploads/1/3/0/7/130775189/4b1d2364309d91.pdfIn PDF document text
    • http://files.killianfoundation.org/uploads/1/3/1/6/131607522/lafufejusugoku_masalulasewe_kibijukipejoge_pigemab.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/5a792b52-7417-4d43-9942-fbad74d62255/xazejanozupise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82e24155-9b37-47c0-bb26-7097bde1f3bb/51922114859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e0bda93-ba53-4d3e-8a64-97cc15672118/zupujerosoxavaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f3fe2be-03de-48d4-a2cc-ab303de02ea5/dajezewuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3a54f7c-911c-4b99-a521-741485d0a7d4/28915424364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1482959-05ba-4961-8c09-b5c30a5e822a/41920909181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17211bdf-17fd-46c3-b8a7-08a44e8928ad/josevugipibuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/013ab578-9d7c-4afc-b9e2-4bbcd9330e77/tiwubutotajasuxuduzuje.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_off00006b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7D 5224 bytes
SHA-256: 346611675c038de19b6674c8837a694dcfc9ba5b223b578406551f488615df79
font_01_sfnt_off00007d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5C 10280 bytes
SHA-256: 7f7327073d56574d3c5858a7c288e1c83ae752741db5653b3e3bc988ecd35097

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