Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b0453ddc3bc395…

MALICIOUS

PDF

36.7 KB Created: 2020-10-03 05:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: ccaebc98da8c9d9bf7c8151365b03764 SHA-1: e076140bc0ea300e3b2c968a570a6e5ff5b754eb SHA-256: a8b0453ddc3bc3956992ef46880df270ff1b576820a2c575ae8896ac4581076a
184 Risk Score

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://gettraff.ru/strik?keyword=fsx.exe+microsoft+flight+simulator%25C2%25AE In PDF document text
    • https://site-1037061.mozfiles.com/files/1037061/45410450128.pdfIn PDF document text
    • https://site-1038927.mozfiles.com/files/1038927/14803544369.pdfIn PDF document text
    • https://site-1039297.mozfiles.com/files/1039297/81698498712.pdfIn PDF document text
    • https://site-1037098.mozfiles.com/files/1037098/redopubewolejipesumewa.pdfIn PDF document text
    • http://files.mpadvantage.com.au/uploads/1/3/0/8/130874482/a201752365ca135.pdfIn PDF document text
    • http://files.jennifercronk.com/uploads/1/3/1/8/131871614/kusisabisej.pdfIn PDF document text
    • http://files.4thchakra.com/uploads/1/3/0/8/130874278/b97731c94f6.pdfIn PDF document text
    • http://files.jgershon.com/uploads/1/3/1/3/131384489/pekufuku-pidojetirike.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/3382827d-0e5e-48a0-ad68-93ad51581ecd/rudej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80fb94bb-4aab-41ee-bfed-96978fb46054/85486511358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2791808b-1c8a-4917-8966-59051e0f0604/8724425175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3605546f-8b97-45fd-bcb7-e5a4df1b81dc/ninaduwavipedekekoruburez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0247d8dd-a376-4900-8707-4d880be8f115/43113779896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c0c3ef4-07ce-475c-b306-17ff7ba30e7b/75298457097.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E2E 5596 bytes
SHA-256: 937da6012cdbddd5f3a8a6e0a7bbd4533b1d4762dc5f33138c88259573cbd6d6
font_01_sfnt_off00006126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6126 10184 bytes
SHA-256: d4cb5a7cb6b2001badd2dc058211e59192bf417cb947311f1aa31a83e27317f2

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