Malicious PDF — malware analysis report

Static analysis result for SHA-256 837e6850e4da75b3…

MALICIOUS

PDF

55.7 KB Created: 2020-09-16 17:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5aa083e2bcb7c3322aaa3ad12c2de267 SHA-1: f669cc3f8fafa24946ade7281bc8a766c1455ce2 SHA-256: 837e6850e4da75b3412afc2b1ea60d40c524e0300a29959bab6a30d6dfc4f2c1
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.club/wix?keyword=american+factory+direct+furniture'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains URLs that are consistent with this malicious link farm behavior.

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.club/wix?keyword=american+factory+direct+furniture In PDF document text
    • http://faviritir.sallydavisstudio.com/uploads/1/3/1/8/131871699/xezisibanufa-mafivakewa.pdfIn PDF document text
    • http://files.gandydancerproductions.com/uploads/1/3/1/4/131437377/xudibevezirifa_jezuviji_zuletakagupo_paselame.pdfIn PDF document text
    • http://guwowifax.skyeridgefarm.com/uploads/1/3/0/7/130775850/goxazu.pdfIn PDF document text
    • http://files.jewishucb.com/uploads/1/3/1/3/131384171/a27ca0cea5790f8.pdfIn PDF document text
    • http://files.maggiebatson.com/uploads/1/3/0/7/130740338/pepabiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://debfb906-9193-4963-b5dd-1d497da3fe0d.filesusr.com/ugd/735189_29b2317e19154cb39412885d5a2b530d.pdf?index=trueIn PDF document text
    • https://2229d4b9-89d1-4ef1-94f2-21daf137d2fb.filesusr.com/ugd/61b8bf_f3add25c2d144ebeaf4dcfb37c5f5add.pdf?index=trueIn PDF document text
    • https://8ead8120-66a4-4bc3-850e-00fe90478b94.filesusr.com/ugd/d1c05f_7c7e89fd0664492498753eec4d46a93b.pdf?index=trueIn PDF document text
    • https://c54ab9a6-fa4e-4498-b368-b24146bf408c.filesusr.com/ugd/24deb6_f3ef6431771c450b86e5106b72604b81.pdf?index=trueIn PDF document text
    • https://0d278480-dcd8-45fd-a451-0bfeec634f7c.filesusr.com/ugd/93c935_5aa260561a6045299a00d9d1e08e047e.pdf?index=trueIn PDF document text
    • https://f7b5c845-a185-43fb-9bbf-259ec816f190.filesusr.com/ugd/1cc777_408a0176bf9446f98d34feccbdf6f9c4.pdf?index=trueIn PDF document text
    • https://811a744d-bccf-476d-9bcd-68f050269b5a.filesusr.com/ugd/668a47_c0efd5db7f6342cfab4c83c36f4a7390.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92A7 2828 bytes
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
font_01_sfnt_off00009ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA2 5048 bytes
SHA-256: 633dbc34fad76b331a0ade6a27faeff59626e256f0879db059cd509baae880c9
font_02_sfnt_off0000adc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC3 9872 bytes
SHA-256: 24464add807bf8fc2539ffca59c19651bb6ef1e762bf0673d6f7541b9ddf2c34

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