Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e215f0b5e8bdc8e…

MALICIOUS

PDF

51.0 KB Created: 2020-10-14 19:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e2ed3bbfcd1e2598bd23c04223e5725e SHA-1: e69f7f755ed061c01e49a8f21fb635459df7a072 SHA-256: 0e215f0b5e8bdc8e516f27ccfda1d96a91f3d073a8b8d1f2755a9ea753aee448
124 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically `https://cctraff.ru/pify?keyword=jabber+guest+installation+guide`. The document body, though heavily obfuscated, contains references to installation guides and the authoring application, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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/pify?keyword=jabber+guest+installation+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f870c8541ba2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f8707a196d33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8702c9ca0d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f87127e0bd97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f86fc42e7986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f871921b1e21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f87067c72395.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3029889.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/rotizizalipi-xulejowo-wegevok-xutijub.pdfIn PDF document text
    • https://site-1043660.mozfiles.com/files/1043660/noxanisorabuvagukoxod.pdfIn PDF document text
    • https://site-1039356.mozfiles.com/files/1039356/pudubaba.pdfIn PDF document text
    • https://site-1042624.mozfiles.com/files/1042624/tifawexunalixu.pdfIn PDF document text
    • https://site-1039935.mozfiles.com/files/1039935/bezesu.pdfIn PDF document text
    • https://site-1038572.mozfiles.com/files/1038572/84944399045.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/1/0494/1185/0407/files/mounting_solutions_plus_miami_fl_33157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7598/3778/files/fuxaliwitenemis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3505fdc-3e83-4ede-a431-025b5de16f1a/sozejixetokitilexufivefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccaa667b-5437-49d4-953f-dec17a467b35/gojixinuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd1bb56-b2f0-4456-8dc9-eceffc8c113d/24670355603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f40124d-eea8-4142-a5c2-5f33c3580b94/potulugirovo.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_off000083d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D1 5120 bytes
SHA-256: 224485b61a92eec98f336ca5cb7db49e8b476340f669b3082ff35190a3ca2a70
font_01_sfnt_off00009543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9543 13024 bytes
SHA-256: f5696e8d0ffc4d791c0d177516d3171ad60b6d7f1a507469b1284bda7f665a1f

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