Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a1d9741fbbf18f…

MALICIOUS

PDF

40.3 KB Created: 2020-09-19 10:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 54181b9879afeee9cc4bb39d593abd76 SHA-1: 13b38016d8e5bfc8cdeeeba538c1063f04e58f76 SHA-256: f1a1d9741fbbf18fc576122bed489e68f8b71f5a74638272398701d1ce856f03
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a specific redirector URL, indicating a phishing or redirection attempt. The document body, though heavily obfuscated, contains text related to 'Deserts of Kharak expedition guide' and includes the malicious URL, suggesting a lure to a malicious site. The presence of multiple external PDF links points to a link farm strategy to obscure the final destination.

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=deserts+of+kharak+expedition+guide In PDF document text
    • http://files.norfolkbigdig.com/uploads/1/3/1/0/131071137/desukubodazo.pdfIn PDF document text
    • http://tebiton.fbcbelfast.com/uploads/1/3/1/6/131606457/zajenuzif_duvawalixe.pdfIn PDF document text
    • http://virota.velvetandjutesoaps.com/uploads/1/3/2/6/132682735/xonatututejev.pdfIn PDF document text
    • http://lijob.dogwooddoodlebugs.com/uploads/1/3/0/9/130969754/7115387.pdfIn PDF document text
    • http://zopefizur.nmctkd.com/uploads/1/3/1/4/131438759/ximepep-misizog-rukubofax-baluwenaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://94312844-60ce-4045-8a7d-ed64993c09e6.filesusr.com/ugd/bdc04d_49358c5e1b9448f48435e4213198dcc4.pdf?index=trueIn PDF document text
    • https://621aa690-71e8-4dc6-a458-3fdf6e2040b5.filesusr.com/ugd/1ebe14_7ffdf404e3a64e46b62b7fb190688504.pdf?index=trueIn PDF document text
    • https://e7ad3402-9029-4717-a85a-136eb5ac2a71.filesusr.com/ugd/a7074a_e0bacc75ef4a4f4fb9933d577c9482ca.pdf?index=trueIn PDF document text
    • https://18748890-a086-4489-81a2-c01f225b0277.filesusr.com/ugd/5f4192_84585652e53a4bcc800e2ce9c599290d.pdf?index=trueIn PDF document text
    • https://03da0318-ac95-44b2-a759-c02f6ced79cc.filesusr.com/ugd/9d869b_cc32cb1ff5e9433189e780ce14dc0517.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 5

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_off00005ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DED 5404 bytes
SHA-256: 6dd3a6b71271b9509c51fd2fbab37ca48b1b947fd9e4d57c1fc12f18c8d2c387
font_01_sfnt_off00007055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7055 10696 bytes
SHA-256: d539d45bffccd86c06f7b4f32c0aa61a9e0eb94cb08d4c9e5ebb163ac7f5c29f

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