Malicious PDF — malware analysis report

Static analysis result for SHA-256 425aa453c90a77a3…

MALICIOUS

PDF

46.0 KB Created: 2020-10-29 12:24:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-15
MD5: f05c89fa06ee8531099784af27887e47 SHA-1: 66943e425f3f180f6352ed991ba3496b2396a8ab SHA-256: 425aa453c90a77a3444a08d9547a82c21b90ab8b4bdb1a69cf22292e32c53581
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://cctraff.ru/strik?keyword=earth+space+science+semester+2+review+answers In PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/dozusepap.pdfIn PDF document text
    • https://delutezebojuk.weebly.com/uploads/1/3/4/3/134353455/34ab40bd2adbf.pdfIn PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/zisokopasanez.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.pdfIn PDF document text
    • https://pibefabetanob.weebly.com/uploads/1/3/4/3/134376782/6171076.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/6eebda85-f181-42cc-9bf1-65702c030042/rodilopazunevesove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6216/5141/files/lovitijaruxexovamutuburen.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/anemia_falciforme_pediatria_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/54079165655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8103/2614/files/1376179172.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/andhra_pradesh_tourist_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2921/5390/files/root_android_phone_using_linux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4234d933-fd3d-49ca-abd3-b82724719314/xomifig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b13d702f-dcf5-4dfd-8725-2a84a416a65d/teboxowuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36e2e5e1-7f37-4cae-858e-c43c4ca83d2b/seluvijudunajagisoxofodej.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/lobamegoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/2126/7878/files/60768145438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3701/0331/files/77608856446.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_off0000671c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671C 5060 bytes
SHA-256: 14ed28d6526009113dae31dbe15092086f3fbdc46feb6582a212754b7d3bfd5e
font_01_sfnt_off0000782e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782E 10696 bytes
SHA-256: 6dc10f6cf3fa672a56f940e20daa7ef79f5f014785aa969a256da3f8b0bd4dad
font_02_sfnt_off00009cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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