Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac4ef31af804cef…

MALICIOUS

PDF

45.3 KB Created: 2020-11-03 23:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 01342ca3f4802f0aad6c16aabc96c881 SHA-1: eb13d2869c96a58925cc3576382fde845afa21fd SHA-256: 9ac4ef31af804cef7673e5ce8b65ca6a437b15b7f0b1347ab795cac7c300f6bb
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://ttraff.me/123?keyword=taya+smith+hillsong+hair In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407994/normal_5f9b45730fe91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5f970e71ea035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393772/normal_5f910e6b81be2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f91115d96b49.pdfIn PDF document text
    • https://bukusafirede.weebly.com/uploads/1/3/4/2/134266240/4ee5e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384310/normal_5f8e657c8deec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_5f8aac42e1178.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/zamozojofijife.pdfIn PDF document text
    • https://wotapidedodibi.weebly.com/uploads/1/3/4/4/134475573/wofizabuko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5f93a868835d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_5f9b7010e33dd.pdfIn PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/nawipedupugunapawi.pdfIn PDF document text
    • https://tetekejitinile.weebly.com/uploads/1/3/4/5/134584465/1677782.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/09433644-f0f3-4a0c-8f16-d13704a50a5f/87409033345.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/andhra_pradesh_rivers_and_dams_map.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/11557671288.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C24 5152 bytes
SHA-256: 24f1e9ee658f67892ec8be6e5d36ba882d9a1784539a91471c6a3beb7b545750
font_01_sfnt_off00006d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8B 10780 bytes
SHA-256: 2ebfa4e6fd1a8bd232993c680b715b540ae9c61616499963bc6d5a4eab8870b6
font_02_sfnt_off00009291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9291 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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