Malicious PDF — malware analysis report

Static analysis result for SHA-256 191d3d72d13cd350…

MALICIOUS

PDF

46.7 KB Created: 2020-09-30 12:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-22
MD5: cfa41afcdb038af35ebdff2e21a5ce18 SHA-1: 1b7de55665024b318421c3933ad50c24ceeeaebf SHA-256: 191d3d72d13cd35025a3ccb84d5a0d2f64ddfabee6f97dfb8fbb42adec18df3d
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://cctraff.ru/strik?keyword=daily+behavior+chart+pdf In PDF document text
    • https://site-1037283.mozfiles.com/files/1037283/35408126082.pdfIn PDF document text
    • https://site-1038768.mozfiles.com/files/1038768/xudadaxovirevumux.pdfIn PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/97964628282.pdfIn PDF document text
    • https://site-1036946.mozfiles.com/files/1036946/jilalunar.pdfIn PDF document text
    • https://site-1037113.mozfiles.com/files/1037113/lilaxubalivudoxududof.pdfIn PDF document text
    • http://wofikem.east-baseball.com/uploads/1/3/1/0/131070357/kegune.pdfIn PDF document text
    • http://balavinev.mortgagesmart.solutions/uploads/1/3/0/8/130814297/4cc7e0c0.pdfIn PDF document text
    • http://files.studioplumpiano.com/uploads/1/3/1/3/131383497/70178f76b.pdfIn PDF document text
    • http://nebemibu.smpwpr.com/uploads/1/3/2/3/132303221/kafipeterediz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6230d1dc-463c-42c5-b741-7261f6bded3c/nanivenodugemopopesubapip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b11c8007-e4a9-4e6d-8441-8b7858192acb/90072524181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b2a1c1-a313-47c6-86dc-f46df90582d6/70830303787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc7a7494-7fa1-4313-9fa9-b82b70dd3339/sezodebok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f173df-2d18-4fde-931f-a9e3028d7cb8/98255077304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/path_of_exile_lightning_witch_skill_tree.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/jubevilororuwejunujusopuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7901/5327/files/bootstrap_icons_fa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/what_are_active_civic_learning_methods.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F9 5048 bytes
SHA-256: 951b59218d3fb15f0a8dc4eba0be616f1717e34592224d68903eb425cdb46db8
font_01_sfnt_off00007b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B44 10772 bytes
SHA-256: 68835fc6c6f0ff93eabd932d4820248f5084fde91cbf31db54823ad3f86dc77b
font_02_sfnt_off00009fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD4 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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