Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d906cc0f4358b1b…

MALICIOUS

PDF

36.7 KB Created: 2020-11-02 04:07:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: b9d9de9ee613f1c2a6b0d39b6b8672bb SHA-1: 7981c6c9a08ef31047176f9098f4897b997c455e SHA-256: 4d906cc0f4358b1bc7d54c647f6712e84a45713343dbb244fc8eb51975f50bee
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://ttraff.me/123?keyword=rubberface+tv+show+cast In PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/8530117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5f98e53da3864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_5f89d43babf2e.pdfIn PDF document text
    • https://jinonapipi.weebly.com/uploads/1/3/4/4/134481743/9668621.pdfIn PDF document text
    • https://fevijalefo.weebly.com/uploads/1/3/4/3/134383315/kotopumomufida.pdfIn PDF document text
    • https://nepufetok.weebly.com/uploads/1/3/1/4/131438640/4044917.pdfIn PDF document text
    • https://tuwijojax.weebly.com/uploads/1/3/4/4/134477229/tomepuletu.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/adb1d58b-8ac9-4c26-bb6e-eaa0c624325b/mechanic_full_movie_download_filmyzilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25faf805-304d-4afe-9fc3-561499f6f6c0/76921780865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ad54235-3b7f-47a4-aabf-87026869b989/xelefugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa7cc08b-a4c2-4699-81dd-50068265a4a3/gakawobezigufaz.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/86889933906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56e8f8d-bbb7-4aad-9b52-0ec686e7ac26/35125938728.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/driving_simulator_unblocked.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_off00005183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5183 5236 bytes
SHA-256: 225c103251f0445cf5486e4031b77f38f5bdabcced11a6568997bb616505870a
font_01_sfnt_off0000636a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636A 10256 bytes
SHA-256: 76c55d9cf81ec18ce46c4865bd7feb8c8876c6d8658749d07157b268b9a36411

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