Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb20449258bb400a…

MALICIOUS

PDF

70.8 KB Created: 2020-10-31 13:15:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d4cc51bc03cbebfbbe48a3b31b3431c4 SHA-1: edf1e28018887b50c61be469191e46b7c103b1e1 SHA-256: fb20449258bb400a002c8b1c5d1ba97d776b38d976a4db18b61c9ce70dcb3468
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://gettraff.ru/123?keyword=5e+order+domain+source'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for further compromise.

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://gettraff.ru/123?keyword=5e+order+domain+source In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375705/normal_5f9c1c01646fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_5f8d36c29194e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5f8c8e23bd699.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/1/0439/3861/1355/files/telecharger_dictionnaire_des_rimes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/754fda33-0a51-4d27-9010-67b3532c7bbb/remouse_standard_4.1_license_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe2b7b73-4ff7-41d5-a24d-260b5862a832/98326998021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1868/0985/files/chrome_ios_autofill_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c88a5e-6311-4f27-bdef-e81cb62c1ff0/19367610240.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/rawasosa.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/bose_wave_radio_cd_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/vemaminolirisomabimonewuf.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_off0000d698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD698 5084 bytes
SHA-256: 414677a00206704062b082e92f291c0a9b8cedcbcaf31474cbeefc2e89a629c7
font_01_sfnt_off0000e7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CA 11556 bytes
SHA-256: 41af76b7a79526986a86b380255260e3b4adff0213d7277cb4b182696314e351

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