Malicious PDF — malware analysis report

Static analysis result for SHA-256 1848d330840a2e81…

MALICIOUS

PDF

34.5 KB Created: 2020-09-16 16:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f25db11de6c388729fe39b9ff8e46bf4 SHA-1: 0ece28f8dc968dce4f7443a21cf49cfe7cdb7df1 SHA-256: 1848d330840a2e8169c7bc475a980d9baa2ab4d64dd8744bbf0baa34162cb180
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to disposable hosting and redirector infrastructure. The ML classifier and heuristics strongly indicate malicious intent, likely related to SEO manipulation or phishing campaigns. The presence of a redirector URL suggests an attempt to funnel users to potentially harmful content.

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=cko+kickboxing+freehold In PDF document text
    • http://revaga.theoaksmith.com/uploads/1/3/1/0/131070722/wapozow_pudawibatafof_wikusajemeli_ziruxakututax.pdfIn PDF document text
    • http://files.themercylist.com/uploads/1/3/2/3/132302876/1ee656cd97cd7c.pdfIn PDF document text
    • http://jewonati.elishiareynolds.com/uploads/1/3/1/6/131636665/6d14240.pdfIn PDF document text
    • http://files.lamourcatering.com/uploads/1/3/0/7/130776254/pikagugusunad.pdfIn PDF document text
    • http://files.brittanynalangan.com/uploads/1/3/1/3/131383604/minalafidadup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5b0d4871-392e-4a1b-a071-73302b1174f5.filesusr.com/ugd/b56239_e3d1daeda039498b93b6d452e4c58090.pdf?index=trueIn PDF document text
    • https://fa5801b5-de68-45c9-8e8e-732a82cd1967.filesusr.com/ugd/2c8d66_7921da934e13465cb7f8bbd80eefe14b.pdf?index=trueIn PDF document text
    • https://fa5ac6a6-68c7-4882-a980-bc3f2eced65e.filesusr.com/ugd/135178_09570144b6d04d6a9b461184f078474b.pdf?index=trueIn PDF document text
    • https://981fa4d0-001c-4939-af78-fe3a0f0e38ce.filesusr.com/ugd/bc4951_ce712b60cb9a4edc85e947e0d6e146e3.pdf?index=trueIn PDF document text
    • https://7a2bd65f-741f-4b9e-b9fd-a02b1795877b.filesusr.com/ugd/24deb6_deaf3f2bbc0e4d9eb7e028d0aed97201.pdf?index=trueIn PDF document text
    • https://3c5250a1-7932-431e-a4b8-3d1a26519876.filesusr.com/ugd/d43733_ee2dcfbb1af040bcbde25511ce7f6587.pdf?index=trueIn PDF document text
    • https://a9a5e5f7-d9b5-488a-bc5a-d66ad6ab29da.filesusr.com/ugd/682d1c_9f6fd829ac85424f8897a84137e57dd6.pdf?index=trueIn PDF document text
    • https://b9fc9117-9c45-485d-9f60-ed741a78653a.filesusr.com/ugd/3283b0_8d27a328b5904df79c6238f93b8a697e.pdf?index=trueIn PDF document text
    • https://5a5b7d38-7f0b-4e92-9ccd-076edc9e83c5.filesusr.com/ugd/ab922d_71409b324187461ea8ce5f0513b5ff04.pdf?index=trueIn PDF document text
    • https://23811151-ce2c-4b53-9630-24acda97c5b6.filesusr.com/ugd/4725f1_8947b12f91f8441197eb0faf8df219a2.pdf?index=trueIn PDF document text
    • https://0f713d39-b414-4eff-bedf-f69db2a7909b.filesusr.com/ugd/c83fdb_07eca63a99cb49b3845ca2a1cfc06e6f.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_off000049e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49E8 5072 bytes
SHA-256: f3ddb7abd21140f9471d5f3da4c186ce0a53784836f238a45a28a5fe23ff3a5a
font_01_sfnt_off00005b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2B 10028 bytes
SHA-256: ee14ccc753c4fa0f6ad0494b883ee867757c128b450bf7c555345ebe001570b1