Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f871c427ea924d…

MALICIOUS

PDF

40.2 KB Created: 2020-11-04 03:17:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: af08442356383642dc9dc85c6aa9cb95 SHA-1: df0a832fcbe7137766f24f76a42511af84900f33 SHA-256: c4f871c427ea924d6ae56b396ec41c46a7f1a336e98307058dff7ae9fa4fd33e
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.cc/123?keyword=campbell+biology+11th+edition+download+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f925ce5ea999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_5f926d870c94d.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/bifamomove/bissell_proheat_2x_lift_off_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/t_ara_qri_sugar_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1bbc36-3d3b-4aea-825c-348a8d633718/wuzuditarozixosi.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/seminary_doctrinal_mastery_core_document.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/18413457634.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/51064448341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b71f54b4-96ee-44d1-b56b-0d909fe8bcce/list_of_tickers_in_sp_500.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/22028738540.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/42035549765.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/84393395868.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/adana_mutabakat.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/texas_geometry_textbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d7401ab-042c-40a2-b4b9-50da7865b7d5/english_as_a_second_language_books.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/vinuzenunalafowu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/scaling_up_excellence_quotes.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_off00005c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C63 5472 bytes
SHA-256: 06c2f040d891e3a44733f469fb98265a92fb2e85b6f9068c993897d71a0aaead
font_01_sfnt_off00006ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF3 10732 bytes
SHA-256: e4b524c048a7c4f1313a9268cf7d4be97d8389d25f3d9e91edcff2367c00d79a

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