Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6d31b03cc86c89…

MALICIOUS

PDF

44.3 KB Created: 2020-10-04 04:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-30
MD5: c0ae6acb45ffcb43d5e69f3be425108c SHA-1: 4fe6b82dfe8025806fedd28bef48cfc3f1631837 SHA-256: 8f6d31b03cc86c89c95ca62178411990ac4b5984ad9daebc6e9a9c5582678e3e
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/strik?keyword=sample+toefl+grammar+test+pdf In PDF document text
    • http://files.flannelgraf.tv/uploads/1/3/1/4/131452944/a5cc773f37a8c.pdfIn PDF document text
    • http://files.mhorakphotography.com/uploads/1/3/1/6/131606273/d473d.pdfIn PDF document text
    • http://files.tammylynnhenderson.com/uploads/1/3/0/8/130874683/malojel.pdfIn PDF document text
    • https://site-1039153.mozfiles.com/files/1039153/58529849174.pdfIn PDF document text
    • https://site-1036898.mozfiles.com/files/1036898/12980079913.pdfIn PDF document text
    • https://site-1039437.mozfiles.com/files/1039437/neremeniwopifejozuxigu.pdfIn PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/jeleritubukerixulurasaxi.pdfIn PDF document text
    • https://site-1042347.mozfiles.com/files/1042347/gabepewozewedekutetowuguk.pdfIn PDF document text
    • http://files.caexpandedlearning.com/uploads/1/3/0/9/130969080/lirimunumesud.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006c38.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006c38.bin)
    • https://cdn.shopify.com/s/files/1/0434/7405/9430/files/11096387719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4160/4263/files/pirenovidewij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9030/3393/files/tasc_non-discrimination_assessment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2324/4705/files/general_election_definition_ap_gov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5353/0782/files/16336904059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8705/7062/files/honda_ridgeline_roof_rack_installation.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_off00006c38.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C38 5464 bytes
SHA-256: 0557027bd024be7832e17d8e07d012aba886226f90f746ef123eb01a27c63b09
font_01_sfnt_off00007eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB4 10884 bytes
SHA-256: 59bd895c14b5ec9394a7e599e062a197b64eb5546efb83117ea4bd800efe3490

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