Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b8446e48433a42…

MALICIOUS

PDF

35.4 KB Created: 2020-09-18 08:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00d5eb2a12ee953e93aa8cbea832ddda SHA-1: b1478164d2fafd130cf7b7902ab1b5ac00162d75 SHA-256: 65b8446e48433a4297aa45f71ee0b5616a7cb4dee42b63398a24cba7e11fe86b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a large number of embedded links, many of which point to disposable domains and redirector infrastructure. The primary redirector URL is https://ttraff.link/wix?keyword=shelby+county+schools+pacing+guide+math, which is designed to lure users to potentially malicious content. The ML classifier strongly indicated maliciousness, supporting the conclusion that this is a link farm used for malicious redirection.

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://ttraff.link/wix?keyword=shelby+county+schools+pacing+guide+math In PDF document text
    • http://titok.noahsacksteder.com/uploads/1/3/0/7/130738824/sujiro-sakelif-zavoza-fobut.pdfIn PDF document text
    • http://files.dissmathstutor.co.uk/uploads/1/3/0/7/130740065/dusijaxilaluxo-zibila.pdfIn PDF document text
    • http://kusanam.slipstreamnewmusic.com/uploads/1/3/0/9/130968961/0d9a6ed2ee.pdfIn PDF document text
    • http://files.carriecharleybrown.com/uploads/1/3/1/4/131407148/9913925.pdfIn PDF document text
    • http://sojuk.thefulfillmenthouse.com/uploads/1/3/1/0/131070493/bubavipifu.pdfIn PDF document text
    • http://zavulelop.mngophercockshutt.com/uploads/1/3/2/6/132681352/pigizasifo_novimesuxusoj_mazigusisegezos_xibexewijaso.pdfIn PDF document text
    • http://joketaso.vegansportsdad.com/uploads/1/3/1/0/131070301/mevedud-bimufupokabix.pdfIn PDF document text
    • http://files.scottkaplanphd.com/uploads/1/3/1/4/131483110/3705741.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://97914a57-62ea-4883-9f62-ddc62690d04e.filesusr.com/ugd/73f3b0_010bb6a5ae7d4729ab054b3d5fce82d5.pdf?index=trueIn PDF document text
    • https://6b9ef3c2-2ade-4c96-b889-90dd5a742910.filesusr.com/ugd/9421c8_99ae4f1476df4ac286a073052183e4d6.pdf?index=trueIn 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_off00004ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BA1 5736 bytes
SHA-256: 8a7537af4869310c977c7e697ef9e7a74cd8d46c4e888dee72b97d3dc95a662c
font_01_sfnt_off00005f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F08 10004 bytes
SHA-256: b3e90f8c47aafa8f21debc5f0a1fcfc929d3debc78a18d9f5f7fccaa33ee2689