Malicious PDF — malware analysis report

Static analysis result for SHA-256 9412f34e824f3bd3…

MALICIOUS

PDF

43.5 KB Created: 2020-10-07 12:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 31c41d11e10702a8e6a77ff370d3e4b2 SHA-1: f6fb6db7e8936760a29c961598eb4672a9357d08 SHA-256: 9412f34e824f3bd3c4c64f48ab5adf5001ab32d21b0c8719efba6388cd7c669c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by an ML classifier and contains embedded links pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same URL as the malicious redirector. This suggests the primary purpose is to redirect users to a malicious site, likely for phishing or malware distribution.

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://gettraff.ru/strik?keyword=big+cat+red+lion+cement+mixer In PDF document text
    • https://site-1037096.mozfiles.com/files/1037096/31314920898.pdfIn PDF document text
    • https://site-1041085.mozfiles.com/files/1041085/79544002194.pdfIn PDF document text
    • https://site-1036713.mozfiles.com/files/1036713/torebugefudexamolutus.pdfIn PDF document text
    • https://site-1043174.mozfiles.com/files/1043174/96725546819.pdfIn PDF document text
    • https://site-1038772.mozfiles.com/files/1038772/59512175714.pdfIn PDF document text
    • https://site-1036759.mozfiles.com/files/1036759/16060477958.pdfIn PDF document text
    • https://site-1036946.mozfiles.com/files/1036946/80929540648.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/1eb71cf3-5db2-469b-b0d7-bd026b515bc1/devodarota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69212c1c-b276-439a-b774-034d32192d1a/sevoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85df94f9-d643-4baa-8b61-1f1a983c4d9f/bisixasugadosuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6144/3230/files/level_capacity_management_strategy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1176/7448/files/viking_oven_repair_manual.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_off00006039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6039 4988 bytes
SHA-256: 31632ab31aa9cb9dddecef91ac197f7efac9b2cfe7caa36b985c6b75e653f6c0
font_01_sfnt_off0000710a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x710A 10064 bytes
SHA-256: 3befd8c7eab4b000a4838273fde19092fe3c102f1f6cde68da4d177103a4a93c
font_02_sfnt_off00009367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9367 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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