Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c91ab18dbbbfed…

MALICIOUS

PDF

44.8 KB Created: 2020-10-01 15:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 76e2e3c6aeb5798ca473bbe071bfd4d8 SHA-1: 5267ec934353ed8884dfa3eb5c31811fe7ad3589 SHA-256: 92c91ab18dbbbfed697dc712622a83f555ab27a108031088f69e57e59c99a8f2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to a URL that is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The file type and the presence of a redirector link suggest a phishing or social engineering attack.

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=understanding+and+using+english+grammar+chartbook+a+reference+grammar+pdf In PDF document text
    • https://site-1037916.mozfiles.com/files/1037916/vamapekaxeredaxid.pdfIn PDF document text
    • https://site-1037175.mozfiles.com/files/1037175/90223209981.pdfIn PDF document text
    • https://site-1036932.mozfiles.com/files/1036932/norul.pdfIn PDF document text
    • https://site-1037169.mozfiles.com/files/1037169/91436472519.pdfIn PDF document text
    • https://site-1036635.mozfiles.com/files/1036635/gumabuwekedafeworoso.pdfIn PDF document text
    • http://files.jillianbretzdoula.com/uploads/1/3/0/8/130813696/8056509.pdfIn PDF document text
    • http://files.lifechurchaz.net/uploads/1/3/2/3/132303270/439fcd56635.pdfIn PDF document text
    • http://tadomo.backstageatthebeach.com/uploads/1/3/1/4/131437130/guxogofajepivizejeni.pdfIn PDF document text
    • http://ginudoz.neokundalini.org/uploads/1/3/2/3/132303338/wewoxakawele-nogoxuv.pdfIn PDF document text
    • https://site-1036779.mozfiles.com/files/1036779/20519172326.pdfIn PDF document text
    • https://site-1037156.mozfiles.com/files/1037156/misipufita.pdfIn PDF document text
    • https://site-1036980.mozfiles.com/files/1036980/91279043952.pdfIn PDF document text
    • https://site-1037202.mozfiles.com/files/1037202/dununalufubelidugoduwal.pdfIn PDF document text
    • https://site-1037245.mozfiles.com/files/1037245/4120718343.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/b35bd73b-bdfc-48a2-ac90-9c59453e42c0/lunodijuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57264d1b-2d09-41c1-bdab-d9bce5f29148/fepud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5b79112-288d-4dc2-a61a-c181c2300df2/vopijimusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1461157-1fd6-4528-8629-652d6feba415/49116139159.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_off00005d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0A 5648 bytes
SHA-256: bd05afc651a6e997d79f5a617c1c5bf579ed0c92209dc7a4a9610c40c4e318dd
font_01_sfnt_off00006ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFD 13364 bytes
SHA-256: 42295ac92f0eaa1731ed5b04b82c9b03db564402f06eb95c4a00dc1d0111f946
font_02_sfnt_off000096a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96A2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361