Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a34147e52028f36…

MALICIOUS

PDF

53.2 KB Created: 2020-09-09 16:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8177c671828796ad6f45d80a64e58714 SHA-1: f167316a9f37e92ec811177fa038c2eb8ac585e1 SHA-256: 4a34147e52028f363b1fb5c51d25fdc0c07264a8242672b17ed09b9dbde5576b
184 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=gce+2019+english+question+and+answer', which is the initial entry point for the malicious redirection chain. The presence of numerous links to external PDFs, many hosted on similar domains, indicates a coordinated effort to distribute malicious 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.club/wix?keyword=gce+2019+english+question+and+answer In PDF document text
    • http://zekakix.westernhorseclub.com/uploads/1/3/1/3/131380213/xebenof.pdfIn PDF document text
    • http://files.mrpielak.com/uploads/1/3/1/4/131406234/f5dff3b44.pdfIn PDF document text
    • http://kovobisa.buffalovalleypuppies.com/uploads/1/3/0/7/130775478/358e5aa54812e.pdfIn PDF document text
    • http://dudus.envirolaser.com/uploads/1/3/1/1/131163992/3712482.pdfIn PDF document text
    • http://xexamis.mckennypto.org/uploads/1/3/0/7/130775740/kaxiputada-nuwuxenagugu-runuxeruwolimok.pdfIn PDF document text
    • http://files.lockmangenetics.com/uploads/1/3/0/7/130775383/nizejab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/77eba6_3b41612960e844f1b7ddda66a7922db8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9b16d1d4224f41dd92eab41919879f9f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/20d83a_d352079674614a2199d753c68b413037.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/99965f_e5cb0eb22c5740afa5ffe7c6fe902c51.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6908d7_1005388e162a4344a5a2517bef9cd65c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/92139819905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0209/3987/files/bhagat_singh_college_admission_form_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/bankers_algorithm_in_deadlock.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/81950067806.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 8

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_off00008747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8747 5932 bytes
SHA-256: 5e1b380fccb3c1b1352aac9fcb1e6779a35e6cc9c3ff172dee8ff4fed81ff143
font_01_sfnt_off00009b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B87 13236 bytes
SHA-256: dabadec68cb46b277a8e1d0becdd3f4f6e2bb7506dddf12d2301b6c1ed04c1ec

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