Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48e8474093f08a1…

MALICIOUS

PDF

67.9 KB Created: 2020-10-25 10:22:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e594fb16349921bd5d2ebe365dd590fd SHA-1: 83bda3bef204d9467fbaa19c0d535853edc4ddb9 SHA-256: f48e8474093f08a1346edf784de231651e96191569602537fec7077050d980ee
184 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains numerous links, many pointing to disposable hosting and redirector infrastructure. One URL, https://cctraff.ru/strik?keyword=the+shepherd%2527+s+crown+pdf, is identified as a known malicious redirector. The document's structure suggests it's designed to host a large number of external links, likely for SEO manipulation or to distribute further 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://cctraff.ru/strik?keyword=the+shepherd%2527+s+crown+pdf In PDF document text
    • https://suludizivot.weebly.com/uploads/1/3/1/3/131383823/d98a4fbbb984.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/gopanigekupoziperolu.pdfIn PDF document text
    • https://jatokogeredere.weebly.com/uploads/1/3/3/9/133997843/6464695.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/dumizu_sarigi.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/gekugetuwexujosewumo.pdfIn PDF document text
    • https://nulakumoxuguv.weebly.com/uploads/1/3/1/8/131871970/boxoxolupodu.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/a2bf9e7b5b332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f899b3acc62d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5f93486232558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371010/normal_5f889093eade7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5f896f5401536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f94d7df30ea2.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/1/0501/2245/7242/files/54902890208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9936/3764/files/set_bluetooth_passkey_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d4223e-b5ed-4162-8049-60af658b3482/padres_brillantes_maestros_fascinantes_augusto_cury.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e5018a7-a60d-4ce9-b5c6-87b04cb189d2/zuzukikenesimukob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/184e16b3-8127-4622-a4bb-b1d6d752a2e0/14040504940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35a381bb-e0d7-4df5-b1c0-597b6d24a718/48052298947.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF3 5076 bytes
SHA-256: 58124fb3bb63d46cdfc12f88e6bc25a40733cb501b0dfe304f86615ee3a1c2f1
font_01_sfnt_off0000dd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD52 11060 bytes
SHA-256: e29b837772c15bc7fd4576f7308c65fa554607f2b7422168aba594e6912a450a