Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca25b19a06cf49d2…

MALICIOUS

PDF

35.8 KB Created: 2020-09-18 13:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 03e36dc99b46ab731ca68a2620d9e3c7 SHA-1: b51ae68befb6937aed43031b0edb23aa3ab23c82 SHA-256: ca25b19a06cf49d2bbcbe79a01d9a9edbb410a934d2c0df469946798a8f1228e
184 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a game-related keyword. It also features a large number of links to other PDFs hosted on various domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector URL is the primary indicator of malicious intent.

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.me/wix?keyword=death+run+3d+y8 In PDF document text
    • http://dupidi.poofdirtfarming.com/uploads/1/3/1/4/131406687/c2aa953.pdfIn PDF document text
    • http://files.oliviawoolf.com/uploads/1/3/1/4/131407572/8964719.pdfIn PDF document text
    • http://files.xingyibo.com/uploads/1/3/1/0/131071114/f1c7fb288fff4cd.pdfIn PDF document text
    • http://rizagi.cn.lglministry.org/uploads/1/3/0/8/130813612/tegerud.pdfIn PDF document text
    • http://sadep.khaoyaiandbeyond.com/uploads/1/3/0/9/130969204/1955b.pdfIn PDF document text
    • http://zavobobo.2018vote.us/uploads/1/3/1/4/131410227/xomaxilam_sirozorodox_medowozubedes_pisulipomufefu.pdfIn PDF document text
    • http://dafeko.madxllc.com/uploads/1/3/0/8/130874254/20e315dad34152.pdfIn PDF document text
    • http://nepafe.amdlifestylemgt.com/uploads/1/3/0/7/130775374/6cadcf0c9f.pdfIn PDF document text
    • http://files.aorerepathways.com/uploads/1/3/0/7/130739140/lijokajo_vamaregusem_tivexufi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://22718d98-2d2c-4828-b0f0-0fd1887ec2a2.filesusr.com/ugd/f08e01_b4a35b42a3b44146aa1258568acb34ca.pdf?index=trueIn PDF document text
    • https://3bec6408-218d-4413-b4cd-98e29560b594.filesusr.com/ugd/1b9faa_21a74790bab2415184cca9e176bdfb60.pdf?index=trueIn PDF document text
    • https://208c455d-93e3-44df-8759-c1b8f29eff97.filesusr.com/ugd/0251f0_e8f66f629f4440e5984cdcfeec09d056.pdf?index=trueIn PDF document text
    • https://9c467621-83fe-4b13-959d-d50ce1c1a9bd.filesusr.com/ugd/a01749_8f79df347fe6461983dc8a9f9fdb91b8.pdf?index=trueIn PDF document text
    • https://92e6a323-8aca-4102-8b72-f6f836b9ea26.filesusr.com/ugd/7a359d_223854231b82447fa281f69a4bbc8f4c.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/gemivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/army_risk_assessment_form_number.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

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D90 5160 bytes
SHA-256: 2d622101c64c119829fbaaad7b9e0d7ad72d2a5fa1c87abbf5e5aba2a54a04c0
font_01_sfnt_off00005f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24 10444 bytes
SHA-256: a59bdf7b7364a15637d8f7d196e89f56e5aa688eff5eb170b2dec3b7957a2389

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