Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3b61ef1d353dd8…

MALICIOUS

PDF

34.7 KB Created: 2020-10-02 23:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 28b7851af00598d55e232533d85e8214 SHA-1: f669e43cc880e2d1362b5a94ab18bbb389faf401 SHA-256: 4e3b61ef1d353dd8ba4a26c7d1ba6fc70ae9e6baebd0a3dda4609c31b7121e8a
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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/strik?keyword=simple+present+tense+interrogative+exercises+pdf In PDF document text
    • https://site-1037071.mozfiles.com/files/1037071/nipiduweguvuxulesuwub.pdfIn PDF document text
    • https://site-1040388.mozfiles.com/files/1040388/ramuxotokunuv.pdfIn PDF document text
    • https://site-1038830.mozfiles.com/files/1038830/popusovewenekedoxiloti.pdfIn PDF document text
    • https://site-1039814.mozfiles.com/files/1039814/3605834536.pdfIn PDF document text
    • https://site-1039783.mozfiles.com/files/1039783/83000531706.pdfIn PDF document text
    • https://site-1038351.mozfiles.com/files/1038351/59504178233.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/gokitilewedisoxeg.pdfIn PDF document text
    • https://site-1038967.mozfiles.com/files/1038967/fejuzares.pdfIn PDF document text
    • https://site-1037009.mozfiles.com/files/1037009/40344958827.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/9549/8392/files/nerasavuverev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d6dd30f-d7ea-4413-bb7b-9a0c6acf655b/31570546697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7321e6be-154b-4301-bc0c-dcad1b7f536b/biwomumisovibomivokivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08626899-ca4e-4c6d-9c74-34bc0b818178/49744155490.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_off0000479e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x479E 5708 bytes
SHA-256: 2f7c08dc76ee2c9382206c880e84bdfa5a9420eee5fa7831d67b0fcdde2aaade
font_01_sfnt_off00005afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFD 10276 bytes
SHA-256: 460098f1b7aab573181109ad11a13d80125092768d731f940bd717b9c00b1ba3

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