Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d93b6e27d07cc4…

MALICIOUS

PDF

57.2 KB Created: 2020-11-05 15:39:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5a020d086a4161e38d7940fe14f545b4 SHA-1: d6d3ff382b99663fed8cab1d6743023e05ea0931 SHA-256: 23d93b6e27d07cc4bf1d80eda47aa72e4dfc860f33fcad3b7515f38a267a6f21
94 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL, 'https://cctraff.ru/123?keyword=ragdoll+achievement+2+hacked+kizi', is presented as a lure for a game achievement, which is a common social engineering tactic. No scripts were extracted, but the presence of the malicious URL strongly suggests an attempt to redirect the user to a harmful site.

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=ragdoll+achievement+2+hacked+kizi In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_5f8be27927b01.pdfIn PDF document text
    • https://fupefasupemeze.weebly.com/uploads/1/3/4/3/134315788/798baf43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388181/normal_5f9149e70290b.pdfIn PDF document text
    • https://jawokipuroz.weebly.com/uploads/1/3/4/2/134265350/vewuja_sopikatipa_migigevexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446034/normal_5fa20fe837f60.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/rimepusox/90100123482.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/what_is_the_classical_theory_of_inflation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/6736/8106/files/urdu_novels_love_stories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e60833-3849-4b9c-baef-5e419e42840f/silverlight_for_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/lewis_dot_structures_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/simple_probability_worksheet_7th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c620ab4e-7e60-442f-bda3-b7a3ada3c14b/72856364968.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000709b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x709B 5524 bytes
SHA-256: 3001c9c43fa9a537c78a5297521be73838917f09c36eb3b1762e82cc9e1702f0
font_01_sfnt_off0000838d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x838D 5392 bytes
SHA-256: 673e562388f76b5c2cbbf196d81ae157c9b3b1af1d66db30ebfc2e185fc3e747
font_02_sfnt_off000095d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95D5 11360 bytes
SHA-256: 047caed2443f6de1dfd3690f0fccb0e84dc026532f5d2d70101ac416cae55c00
font_03_sfnt_off0000b971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB971 17892 bytes
SHA-256: 90f9f951eca86a04734469e0f78200eb5f1575280058fa1738e882437a77adba

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