Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d3f0cbd853ba9f…

MALICIOUS

PDF

48.4 KB Created: 2020-10-16 06:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-28
MD5: 4f2ae3bb7e0d838e8d18dd3735a4f669 SHA-1: c290d205ed0ac00e8316ca1f3e18ea8278539408 SHA-256: c5d3f0cbd853ba9f9f88bd22a85bda872ec09b25065bb815bed31135df9fc2c7
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/123?keyword=instructions+for+mario+monopoly+gamer In PDF document text
    • https://site-1042025.mozfiles.com/files/1042025/apostila_de_ingles_iniciantes.pdfIn PDF document text
    • https://site-1044202.mozfiles.com/files/1044202/wolurupozivimiferaruti.pdfIn PDF document text
    • https://site-1040180.mozfiles.com/files/1040180/rivofugad.pdfIn PDF document text
    • https://site-1036876.mozfiles.com/files/1036876/dewedubeparivazo.pdfIn PDF document text
    • https://site-1036628.mozfiles.com/files/1036628/69810007468.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/xinabomawukuzetuzu.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/sifana_lasupovapob.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/6641841.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/be2d4aa7-909d-4bfe-88dd-a2385ad23a5d/92575005195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a266f28-c991-4993-8591-54d99220dd77/55641975168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7850/8440/files/gevelizarusubepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8529/9876/files/94344590270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18406fc8-91bd-4fdc-8f2c-99c6ad1c28d2/butadoviruwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df42ea93-2030-4032-8613-5928f1e75f92/28329207060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a203c7-ed5d-4e43-a763-ce20fccc9b8f/tesiwiguritawagedebip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1af645-f2f7-455e-b5c0-48d3fbe268cf/mizobapofiramefofopab.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_off00007fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB4 5376 bytes
SHA-256: 33f5393fef0f9cbf80cd88a7d56e3d31e5a133fec3894d72288919a315dbc7f5
font_01_sfnt_off000091e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E7 10072 bytes
SHA-256: 9b89e4ee3c52ed4e3573de0fe5c222337110e0ab5645cb15e8822edb69aa57ed

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