Malicious PDF — malware analysis report

Static analysis result for SHA-256 391f5ad78c6443b2…

MALICIOUS

PDF

42.4 KB Created: 2020-11-06 02:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 65ff7254b5bef65a7cb59a958fc79f8f SHA-1: 19d09789925e0f6f12d158b10753ac980d833018 SHA-256: 391f5ad78c6443b2b64a0ad503b2fb0f77fd87b39711409e1a579c426d7eb788
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is disguised as a search result for security software. This suggests a phishing attempt to trick users into visiting a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect the user to a potentially harmful destination.

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://traffmen.ru/123?keyword=kaspersky+total+security+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5fa4163303fa1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375703/normal_5f8dfae016230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5f8f440630c2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417809/normal_5f9caba7b04fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425917/normal_5fa2c397033ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450244/normal_5fa06eaf64842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393356/normal_5f966dc34d2e7.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/d019e189-89a3-4880-a258-1d310f92fe11/metabolic_conditioning_workouts_body.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/zudowoweforo.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/modern_game_bantam_hatching_eggs.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/panchang_calendar_2019_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/srimad_bhagavatam_in_bengali_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6810cceb-02d7-409d-bcde-6ac017656bde/goxojunagasujunonejas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ee21a9d-bacb-4048-bd0d-97f0ecb1bd19/11889666001.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_off00006678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6678 5336 bytes
SHA-256: 789baf5894bab5bab5df0621897ec996f8c81df20aa47a17b9d5ae5c96b5906e
font_01_sfnt_off000078ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BA 10700 bytes
SHA-256: fb948ca768c2afd74cdced1e0ea0d2b6f1235478bcbc8b1fdc7ac7da275d6634

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