Malicious PDF — malware analysis report

Static analysis result for SHA-256 425a6379117ba7a3…

MALICIOUS

PDF

64.1 KB Created: 2020-10-07 21:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-15
MD5: fb4de372f067a5fec0f7f3802ca67868 SHA-1: c35e79b43773dbf8e8a375a5c6b138f05ea20c79 SHA-256: 425a6379117ba7a3997ae15ff137cf23e4a828b95d9166d10a820b85621124cd
132 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=simple+past+tense+exercises+short+story In PDF document text
    • https://site-1048452.mozfiles.com/files/1048452/32352163476.pdfIn PDF document text
    • https://site-1036743.mozfiles.com/files/1036743/21585406612.pdfIn PDF document text
    • https://site-1036936.mozfiles.com/files/1036936/mokilexere.pdfIn PDF document text
    • https://site-1042737.mozfiles.com/files/1042737/runanilok.pdfIn PDF document text
    • https://site-1037145.mozfiles.com/files/1037145/gijeluxeroso.pdfIn PDF document text
    • https://site-1039182.mozfiles.com/files/1039182/jitikabafevepipeve.pdfIn PDF document text
    • https://site-1037276.mozfiles.com/files/1037276/nolozuv.pdfIn PDF document text
    • https://site-1036719.mozfiles.com/files/1036719/95798475687.pdfIn PDF document text
    • https://site-1045331.mozfiles.com/files/1045331/56564247580.pdfIn PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/wasezotikemevafapibuxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/009e5f66-e250-4ada-8ec4-bb2f7e799b35/5003308931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf2182e-4ed0-47e1-ad2f-a3725f34eecd/33480095714.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDFE 5448 bytes
SHA-256: 21c06ffaa6149b808c609d1ec581bc0ff1974168905a3fdc321b698b768b57ab
font_01_sfnt_off0000d05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05D 10224 bytes
SHA-256: 6324ee3298ccc1edf6c0111f2fa42fc2a1d3419ded0c0097bdd932b7651d89a3

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