Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c61ec31a4df1137…

MALICIOUS

PDF

52.2 KB Created: 2020-10-08 18:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-06
MD5: 1ac85e6578671ea108603b85c0257012 SHA-1: 485f24ebca171e22c10db9c3989fe40880874912 SHA-256: 6c61ec31a4df1137f32f82f04f0734a37a56ca5d5251ce6e3111c85ebe77d5aa
140 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=florida+realtors+addendum+to+contract+form In PDF document text
    • https://site-1042731.mozfiles.com/files/1042731/97064659287.pdfIn PDF document text
    • https://site-1036972.mozfiles.com/files/1036972/42514893334.pdfIn PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/25949386750.pdfIn PDF document text
    • https://site-1038555.mozfiles.com/files/1038555/betolagusovogadakegirew.pdfIn PDF document text
    • https://site-1039488.mozfiles.com/files/1039488/48332907306.pdfIn PDF document text
    • https://site-1037203.mozfiles.com/files/1037203/80721440201.pdfIn PDF document text
    • https://site-1036742.mozfiles.com/files/1036742/50367691161.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00008d42.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00008d42.bin)
    • https://uploads.strikinglycdn.com/files/9b25cae7-078b-4764-bd38-24df697dc17d/28501376042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c2c607-a0a6-467e-9afd-e709d44be880/57197606025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c240e0-10a9-4f5c-85a9-fe8ab8adc5c3/vidiwojegul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1bc040a-1f28-472a-9106-deca3574de27/vigusijoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f8e72bb-d567-4d1f-9858-3e00d4206434/45102881418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4fee2a-9e34-4a36-8279-d55527bdd8b9/sumiroxixojozotoximugeko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3567dee7-ad59-4f98-b423-6c507f0e03e1/3034840861.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_off00008d42.bin)

Related samples 5

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_off00008d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D42 5124 bytes
SHA-256: a8315b91c28a3d74261aba3f127f8f8d1ebfd587ba624306a7ce29a2fb1a01bf
font_01_sfnt_off00009e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E9A 10908 bytes
SHA-256: b6867d7d6f4aa24d333e9df74a88f596e99b00cb9ba8146ea43aa5c4273111d1

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