Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f05accc11c809b8…

MALICIOUS

PDF

46.1 KB Created: 2020-10-14 22:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0b304b0730dfb79da1dd3085c7621b5c SHA-1: b7e21073ea362057e51a976f615365e8aef07e35 SHA-256: 2f05accc11c809b84ff6fbdd5a6237fb3780e5865c622c32c55081d14214630f
184 Risk Score

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/123?keyword=invitation+letter+samples+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f8743b760b5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f86fc9d65972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f871adc64e54.pdfIn PDF document text
    • https://site-1042919.mozfiles.com/files/1042919/movafi.pdfIn PDF document text
    • https://site-1038429.mozfiles.com/files/1038429/kelelobogonekuba.pdfIn PDF document text
    • https://site-1045392.mozfiles.com/files/1045392/vakezalumitexidinefe.pdfIn PDF document text
    • https://site-1040558.mozfiles.com/files/1040558/54232118153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f87269ad4f45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f8705a489b6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f87157c120fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f874afbd1d94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f8701afde278.pdfIn PDF document text
    • https://site-1043668.mozfiles.com/files/1043668/nuziboniduxajuwexiwimelim.pdfIn PDF document text
    • https://site-1043220.mozfiles.com/files/1043220/jufewo.pdfIn PDF document text
    • https://site-1036692.mozfiles.com/files/1036692/97613234321.pdfIn PDF document text
    • https://site-1039190.mozfiles.com/files/1039190/vuwufigofudejifituxulutov.pdfIn PDF document text
    • https://site-1044067.mozfiles.com/files/1044067/pawokofotelazatex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0461/6444/3299/files/rofumodijavijako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5381/4438/files/97027772493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7619/0361/files/zudej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9bb2c3f-9b7f-40d4-a832-221a45c083e3/sebazosibulawesud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8ed16e9-1e25-48ec-b05d-b3139e2e7339/80712216611.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_off0000687e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687E 4972 bytes
SHA-256: c23c6c705481c237a7fe81cfdd2a8bb19077302218d68cc5bdc94375c1c67cd6
font_01_sfnt_off00007945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7945 10332 bytes
SHA-256: 4fae17cc3c3ac2ff66a6f1172d5f23df694c0b56723c514fbc7daf042cc87be4
font_02_sfnt_off00009c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C6B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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