Malicious PDF — malware analysis report

Static analysis result for SHA-256 7290250c39cf005c…

MALICIOUS

PDF

34.5 KB Created: 2020-11-04 04:45:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4f6b470271cbd86e10c3a976dc94c27f SHA-1: 37b1fc38fbb35e14d6ff438c8a90ed4abd227b26 SHA-256: 7290250c39cf005c779156da33193019895c53b46e9b0d8392e4bd7100c99621
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://cctraff.ru/123?keyword=ohana+outdoor+furniture'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector suggest an attempt to lure the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/123?keyword=ohana+outdoor+furniture In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_5f992a2dd2065.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/talavulezu.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/puxobovojo_wuvagiralu_mazufulan.pdfIn PDF document text
    • https://mewuvirinikupu.weebly.com/uploads/1/3/4/5/134505229/196636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415321/normal_5f9858f88d89e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zinudipir/brachial_artery_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f640be69-e37a-4cc8-885c-a1154b1299d6/6409079054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69752691-0f1a-4b4b-abf6-759958200455/60709418090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c2d71f1-d17c-413c-988c-1eac70af64db/fagegovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e7af0e7-e9b2-4889-97ca-0275fb8c857e/bilup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1164e1c8-5ed8-47a3-8271-bd69bb74cd0b/foboriranoxetom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c880549-bef7-4806-8565-879d57995244/88153866802.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/legavariwixalixar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9247bc57-4c27-4c13-b66d-aae226f603bd/63782618080.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_off00004913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4913 4812 bytes
SHA-256: db008d580a48c62f7ae1f230bcfe6757ca6e6ad244bbb4a94e7a4fe87c4d298a
font_01_sfnt_off00005964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5964 10664 bytes
SHA-256: e59dd86735f2a9012b419fcb45641bac9f26083b9702daaa2d1c55f3e478ccb7

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