Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5cf6d965985832c…

MALICIOUS

PDF

36.8 KB Created: 2020-10-06 12:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 68f563572266f0f736b0e5b503064038 SHA-1: 7e3dea04b94b4010cf896b1d6153a29b011e556f SHA-256: f5cf6d965985832c4102f1c250d05ebc213fb61707cd8df3ab431756b4a2cbe1
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of embedded links, many of which point to disposable hosting and appear to be part of a link farm. One of the embedded URLs, https://gettraff.ru/strik?keyword=pdp+deluxe+wired+controller+manual, is identified as a known malicious redirector. This suggests the document is designed to lure users to malicious infrastructure, likely as part of a phishing or malware distribution scheme.

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=pdp+deluxe+wired+controller+manual In PDF document text
    • https://site-1042452.mozfiles.com/files/1042452/mekexopabiwux.pdfIn PDF document text
    • https://site-1042013.mozfiles.com/files/1042013/mefoliwemida.pdfIn PDF document text
    • https://site-1036639.mozfiles.com/files/1036639/kaxobarazipukidefosuvoku.pdfIn PDF document text
    • https://site-1040575.mozfiles.com/files/1040575/71106543095.pdfIn PDF document text
    • http://duzokub.justwrite15.com/uploads/1/3/1/8/131857204/53b80f52d7afc.pdfIn PDF document text
    • http://kezowuji.melissalamoureuxlmft.com/uploads/1/3/1/4/131453872/bb8f3ac3152.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/1/0485/9248/6565/files/panic_at_the_disco_tour_band_members.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1152/1187/files/bapogebomowivejenavepuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef0bccd-e74e-44bd-a3e8-bf3693ac1115/61812080764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6854178b-72f8-4719-86f3-db52c2ae8f08/jixomivotazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d33033f-0503-4b4b-8838-7ec86f5d6258/tadeletudobijofesozar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a951030-e4cf-460d-ab2e-a11f8c8bc3a5/newagelumidasabeduso.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_off0000505a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x505A 5200 bytes
SHA-256: e2b4f2125a77233d4344e0808c8ac4ca852921dd50a7a5298a38886a0b8c3e87
font_01_sfnt_off00006207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6207 10640 bytes
SHA-256: c4dac748d948d2493cbc39e6b41bf2dc4c34d447c1b467ffbfd555c48571f1a8

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