Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c69c57cd51fa41f…

MALICIOUS

PDF

36.3 KB Created: 2020-10-04 16:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8b2a8ffae81c35e63ddb6eed96959883 SHA-1: 7e4fff6f53d983c32587a206397c84c738d1fa5f SHA-256: 2c69c57cd51fa41f23aa31e4a7dd03c0534f1f57cdba5ca4b876d2671f53ec6d
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=traffic+click+botz+download In PDF document text
    • http://vutuba.royalmarineser.com/uploads/1/3/1/8/131871787/zamazarasa.pdfIn PDF document text
    • http://files.ridelcc.com/uploads/1/3/1/4/131483371/naxugex.pdfIn PDF document text
    • http://tadajox.katedacy.com/uploads/1/3/0/8/130814448/16ed5.pdfIn PDF document text
    • https://site-1040170.mozfiles.com/files/1040170/4543249226.pdfIn PDF document text
    • https://site-1036900.mozfiles.com/files/1036900/xalutob.pdfIn PDF document text
    • https://site-1041498.mozfiles.com/files/1041498/dasexakifarefivolusegu.pdfIn PDF document text
    • https://site-1038407.mozfiles.com/files/1038407/42824830793.pdfIn PDF document text
    • https://site-1040104.mozfiles.com/files/1040104/13230825520.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/1/0481/3104/7577/files/the_management_of_a_company_has.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8454/8770/files/17771946567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4489/5909/files/77974836846.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_off00004688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4688 5132 bytes
SHA-256: c3df86df8218ab819032b0ef5350226345236d3ebf9f731bed53b0f9947b9716
font_01_sfnt_off0000581d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x581D 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000060ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AB 10416 bytes
SHA-256: faf67fe2cf33ba3d6e40e2af63bb1da68b768cc866700d18b350b7f116b8b8aa