Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bde3376635237c8…

MALICIOUS

PDF

32.1 KB Created: 2020-10-30 05:53:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a3ed2afe324d28781c41776f9880bba6 SHA-1: dd413831f1cd8fd6c580d41ba1c4cdd1cdc9d5bf SHA-256: 3bde3376635237c8940aec0e1ffc0148af5b656754432b8ea5a1c537b33f3803
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?keyword=marilyn+monroe+plastic+surgery'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body indicates an attempt to lure the user to a harmful site, likely as part of a phishing or malware delivery scheme.

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/aws?keyword=marilyn+monroe+plastic+surgery In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5f93a9f02a840.pdfIn PDF document text
    • https://pirowefe.weebly.com/uploads/1/3/4/4/134444143/56677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382953/normal_5f8e4239433eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f9064423c1ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388162/normal_5f8d2bf9a01fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394062/normal_5f9578dba3807.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/1/0500/7022/5060/files/sea_fish_guide_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c180e3dc-ab69-4161-8746-c021009d9af8/17367964424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/7830/0862/files/29742359314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a45ad8a-25d6-4e37-bb53-015eee93035b/niteserefareg.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/counterfeit_products_in_malaysia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3934/9146/files/51686483334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/fisica_1_serway_jewett.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58cb461d-ffd0-4c2b-a9ea-57ecb9861683/werner_theory_in_coordination_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8468/3166/files/android_9_new_features_sony.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3232bd6-27e6-4b6b-9496-44010fb66106/disuwapilepufojeruseveso.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_off0000434c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x434C 5360 bytes
SHA-256: 2767ab08124b02a064909ab4a118d903430d13df7d890768c88d7408e6984aa8
font_01_sfnt_off00005583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5583 8844 bytes
SHA-256: 07d29b9d5f1c35e169b157137c7d8db1cc8d294576675e5e14c1988929c16867

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