Malicious PDF — malware analysis report

Static analysis result for SHA-256 34452d4ed1717b99…

MALICIOUS

PDF

48.4 KB Created: 2020-11-03 05:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 832a3f1d7c6803809ffc751a98943440 SHA-1: 099afd915e6e0e44f08d74881fcf57a2415bf85d SHA-256: 34452d4ed1717b99d2da3db73ff89d878535729861446ec83ff361bcc05ea8d7
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.me/123?keyword=wingstop+survey+usa'. The document body, though heavily obfuscated, contains text fragments that suggest a lure related to a 'Wingstop survey'. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be social engineering via a malicious link embedded within the PDF.

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://ttraff.me/123?keyword=wingstop+survey+usa In PDF document text
    • https://totobulamu.weebly.com/uploads/1/3/4/3/134310137/zagumise.pdfIn PDF document text
    • https://gunapozebufe.weebly.com/uploads/1/3/4/3/134316646/newuwakufi.pdfIn PDF document text
    • https://rodamopuxex.weebly.com/uploads/1/3/4/3/134354351/91a1ab520.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/tonemakopinibem/kejuxirixepigima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf78ff43-8cea-415a-b9ad-f2d403ec3557/lego_mindstorms_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/88416695395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca864895-18d1-4316-84a9-7860ab9d844f/warren_buffett_philosophy_of_investment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ac9781-4399-408e-9bfe-b0bdb196bdf8/dijezojesexiwowenixezis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad4b5db-c4f4-4b94-aec1-87e193e27c7e/93176393355.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/hampton_cruiser_bike_seat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffa2f205-968c-471b-acfa-b49855a510a4/gta_v_hotel_assassination_stock_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7464/7732/files/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3532d8e5-78df-4e31-aaa8-d356a6f1c0e1/rineto.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_off000062a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A1 5128 bytes
SHA-256: 8a94a3ef902ac76384a718a707917b225115a1c1c3093728b6acad5c30e479bf
font_01_sfnt_off00007441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7441 10960 bytes
SHA-256: fc8b770b66ef2aa5311e78552a357520854d69dc24f74c0d215c6312b882792d
font_02_sfnt_off000099b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B5 17836 bytes
SHA-256: 3ae1604a13bf249f9f840620a44eb656f6a1065e20eaaeef775877d9d3cbbc8d

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