Malicious PDF — malware analysis report

Static analysis result for SHA-256 48905be7d8644e7a…

MALICIOUS

PDF

42.9 KB Created: 2020-10-02 15:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c0b715bbae381f37147eca9f940aac0 SHA-1: 1c6b3cd3e644aab4917a7c5852c2b4f1e547e998 SHA-256: 48905be7d8644e7a1211560331812178d9387053a8befec784cab2b579298ae8
184 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The document body contains numerous URLs, many of which are to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning attempt. One URL, https://gettraff.ru/strik?keyword=understanding+human+communication, is identified as a known malicious redirector.

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://gettraff.ru/strik?keyword=understanding+human+communication In PDF document text
    • http://files.evelandfarm.com/uploads/1/3/1/4/131436971/93088aafe1eb3.pdfIn PDF document text
    • http://pugenemi.socalseas.com/uploads/1/3/0/8/130874063/3459940.pdfIn PDF document text
    • http://files.greendragonkungfu.ca/uploads/1/3/0/7/130775462/vifuxavogoki_fujewajagubuled.pdfIn PDF document text
    • http://files.holyfamilykofc.org/uploads/1/3/0/7/130775862/bazakij_bepazudurokele_fixopifusaxabum.pdfIn PDF document text
    • http://files.glennstenson.com/uploads/1/3/2/6/132695405/10e252671f62.pdfIn PDF document text
    • http://files.bomsosu.com/uploads/1/3/1/0/131070314/suxipapilapi-vifek-daposisunupe.pdfIn PDF document text
    • http://files.studentsneedlibrariesinhisd.org/uploads/1/3/1/6/131606006/mejozimusowotaf.pdfIn PDF document text
    • http://files.yogaflowlivermore.com/uploads/1/3/1/4/131406222/fawur_keluko_zuduzakep_jibiporogokelu.pdfIn PDF document text
    • http://files.tidewaterservices.net/uploads/1/3/1/3/131381542/bejikojomovivo_jafomafefom_xisozufa_mogasere.pdfIn PDF document text
    • http://xapuru.mysuidora.com/uploads/1/3/1/4/131437626/nonumodawizerafos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5468/4565/files/godijodalavozorijerud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4647/6708/files/summertime_saga_android_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1714/1909/files/sue__sue_counseling_the_culturally_diverse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4111/9653/files/23197810530.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_off00006991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6991 5312 bytes
SHA-256: 1be2553a02d7bc6d41a3d72387760786060b40273d762a2eeccbe0a77714b52e
font_01_sfnt_off00007b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B78 10348 bytes
SHA-256: 5abef82b7b917d42a2872795003271463cdb43918e74fd2e9c8651f0a08d17f4

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