Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ae40bd22baffab…

MALICIOUS

PDF

107.9 KB Created: 2021-01-08 13:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a9caab37ac2bdca69743d78d20579c53 SHA-1: 2bb9eb35b2e4de5b298417b6e0b4ffb9adc2f359 SHA-256: 49ae40bd22baffab235d1fc281b4651d9b5a44daa463256b5ed98b5d229ced36
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'traffking.ru'. The ClamAV detection and ML classifier also strongly indicate maliciousness, likely related to phishing or distributing unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/aws?utm_term=firefox+marketplace+app++for+jio+phone In PDF document text
    • https://cdn.sqhk.co/kepebeso/hg5jjen/blue_light_glasses_amazon_tijn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_5f9334b966a86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f8acb5b9d34f.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/f4661c995d73d16.pdfIn PDF document text
    • https://jawuzinirofona.weebly.com/uploads/1/3/4/8/134886132/jozepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f8bb4a5c4469.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392860/normal_5fcdd1eddd90e.pdfIn PDF document text
    • https://jososipiwudamuw.weebly.com/uploads/1/3/2/7/132740918/keziko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449987/normal_5fdb3e7abfd16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408863/normal_5fd7a248cd6ac.pdfIn PDF document text
    • https://xivexibajewubud.weebly.com/uploads/1/3/1/0/131069970/6036799.pdfIn PDF document text
    • https://cdn.sqhk.co/pugalaleluti/jhiieie/happy_birthday_cake_designs_new.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/f71a24b8-a6a2-4af3-b0c1-dc65cf85f7b3/13038958571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddad63a7-e295-4e3d-b7c3-a531a9789919/54410004462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74806ebe-9b49-445d-9e51-f10dbb71fa72/logo_game_pack_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4f37053-763e-4d41-9735-6a723b14fda0/64752216585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab90f339-3f7c-4e9b-9688-ddcad07ea404/cajas_de_carton_comprehension_answers.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_off00016802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16802 5240 bytes
SHA-256: 58bc93dc4ad4430fcc5b7acad51d1f2946574075c8f775b8b909e6e40bb23208
font_01_sfnt_off000179b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179B8 12084 bytes
SHA-256: e6e1cc310bff98f4d137aa6eb1761fbf0a8b5a3fe1cc62db9e743f87cec834b7

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