Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f191e276bacf73…

MALICIOUS

PDF

38.6 KB Created: 2020-10-16 12:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-01
MD5: 8f8880537f49377ffff026f8ebe008f9 SHA-1: b303f86785dcb0b16ca3b8a891181764d657f07f SHA-256: a4f191e276bacf7305d4fb5dd66179372fabde4f5be76a07746ecb9dfed57c23
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://ggtraff.ru/wb?keyword=fallout%204%20hooded%20rags In PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/49e81e.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/2642225.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/tidivobinimigip-banez-batipafon.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/630dc3.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/6517317.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/segaboseze.pdfIn PDF document text
    • https://lusukukupesakub.weebly.com/uploads/1/3/0/8/130815137/6ea94d94db3.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5d6f2da.pdfIn PDF document text
    • https://fusesekomufe.weebly.com/uploads/1/3/1/6/131606177/kuvopom.pdfIn PDF document text
    • https://razesupimo.weebly.com/uploads/1/3/2/8/132815812/bizuguzabisewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f881490ec209.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f877760b8ba7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f8787fd48c53.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004dd5.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004dd5.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00007f16.bin)
    • https://cdn.shopify.com/s/files/1/0434/1740/3549/files/rejusijazudubixekabofanev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2893/7385/files/libros_de_amor_propio_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0010/5624/files/stream_blade_runner_2049_4k.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/about_web_designing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abb58719-2c9b-41cb-a5de-3837e2024fa8/retuvuxotixajupevoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af5cb6f5-1ee0-4bd5-acb2-1c7474f73fe9/guzaradetuzixute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f49b651-4726-4fc8-8080-c515372afd22/zenedejuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ca6088-327d-4ae9-9a64-c7cef6dcf41a/rovuzumenobonukuwinero.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 extracted file (font_00_sfnt_off00004dd5.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD5 4856 bytes
SHA-256: e4413b76feb9b76711a5cc7344f0bb0841291d1fda40ee9b712625325a760d76
font_01_sfnt_off00005e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E72 9560 bytes
SHA-256: 3823ef6bcf7045c1bd2c37be4d3937bf4ed1e3bce566ed254bd8027ab79b3bd0
font_02_sfnt_off00007f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F16 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e