Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0e362b5757778c…

MALICIOUS

PDF

44.6 KB Created: 2020-11-01 05:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8bdbdc88e40ec0c90014d9cba43a9c6a SHA-1: d4219c064884119c0dca2d68f0c7c16e46ad065f SHA-256: 2d0e362b5757778cbd364fc75cc35060743bbc9103e3d8fc26642fed0b92bea6
184 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting and known malicious redirector infrastructure. The primary malicious URL identified is https://cctraff.ru/strik?keyword=create+large+table+in+latex, which is flagged as a malicious redirector. The document's structure and link farm behavior suggest it is designed to distribute malware or lead users to phishing sites.

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=create+large+table+in+latex In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393503/normal_5f9ba2570add0.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/nukulazugebuvaza.pdfIn PDF document text
    • https://juleladenoduko.weebly.com/uploads/1/3/4/4/134478401/06249c718e6b.pdfIn PDF document text
    • https://gefelamanak.weebly.com/uploads/1/3/4/3/134353999/gebezuxibatopaket.pdfIn PDF document text
    • https://vilomaranetuxer.weebly.com/uploads/1/3/4/5/134502128/pitugo_rokapi_mexitekas_tuzaforawavanok.pdfIn PDF document text
    • https://dikanutedageke.weebly.com/uploads/1/3/4/4/134457663/tevujug.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/bosalusazubanido.pdfIn PDF document text
    • https://zepaxanodufinek.weebly.com/uploads/1/3/4/4/134455649/netorujovo-nifujedagidut-tikovifobetaxus-bazabalela.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/25d898778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382627/normal_5f98df11029ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/sources_of_error_in_titration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8876/7904/files/hink_pink_worksheets_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6354/9338/files/upsc_cse_mains_syllabus_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6875/8453/files/uniform_evidence_law.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_off00007121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7121 4788 bytes
SHA-256: aaf6fc3c00a682ded47c39c4f2c6c31df1f0f8a830ff8cbfc088263f88274c65
font_01_sfnt_off00008176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8176 10876 bytes
SHA-256: 82a2894faad439e79c850d7b9402dadc5abd6c8d3098b32690f90f9a609db031

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