Malicious PDF — malware analysis report

Static analysis result for SHA-256 445760b65af4ad5f…

MALICIOUS

PDF

57.9 KB Created: 2020-10-30 16:14:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 0415240269ff709d133fed7dce6bfacd SHA-1: baccb866235d83957694d8e90d79a6aabb135917 SHA-256: 445760b65af4ad5fd256a9dae1d3072151607b73a1b18ac337f59242ef1ee462
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary redirector identified as 'https://cctraff.ru/wb?keyword=libros%20del%20peronismo%20pdf'. This infrastructure is flagged as malicious and part of a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://cctraff.ru/wb?keyword=libros%20del%20peronismo%20pdf In PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/jajix.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/3536370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5f986f21c44f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5f8a0bae9c7b9.pdfIn PDF document text
    • https://joleziravakejar.weebly.com/uploads/1/3/4/4/134460301/wuvadiwudow.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/fimudamewokik.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/roriturosiw.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/8c47fb489d610cf.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/5623975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379610/normal_5f8c8e82eed88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/196b87c2-5cfb-4403-b51e-01918e84dab3/49407771553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8677/6993/files/south_florida_national_cemetery_lake_worth_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95169741-09a0-4bb5-a0ae-49142d233ba2/debozubudogifuzagulabal.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000093e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E7 4512 bytes
SHA-256: 98ff5bd2753bef4b32193d8bd0fee138e543735024009113db0962b42b8e0fed
font_01_sfnt_off0000a397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA397 5060 bytes
SHA-256: 7b1d309d8150afb80f885f4b47e002b7a2d3e23b90ac097c01d475a772ac9448
font_02_sfnt_off0000b4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B2 11224 bytes
SHA-256: b63be84b0ded035ddb33d809f29b1a67b0e6152022c3bdee59ed720e1f77adc1

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