Malicious PDF — malware analysis report

Static analysis result for SHA-256 57fa9cc853b49401…

MALICIOUS

PDF

46.6 KB Created: 2020-10-26 17:22:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aa4c602127650d47ff955d17024396b8 SHA-1: 2865e96618799da2cd04d87f62a88dcab3ad3cb8 SHA-256: 57fa9cc853b49401045ef46546b9c50a749face605925e0a7336be595aa10a4f
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.ru/123?keyword=l%2527imparfait+exercices+et+corriges+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_5f90a0c89181f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f8c284429af4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5f93c164ce7b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5f9618f87e03f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f8dd5901d5ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f86fecf0076f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f90dd071090c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_5f922a8a849f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gitipelut/pdf_autocad_online_converter_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/alzheimer_tratamiento_natural.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/87670057346.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/worthy_of_it_all_chords_f.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/cuentos_2_edgar_allan_poe.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/cambridge_english_empower_c1.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/xilaber.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/park_tool_big_blue_book_of_bicycle_repair_download.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/careless_whisper_sax_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d79ec5d-2013-4c5d-b486-9acd071c36d8/47544395530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ad9cd9d-e31b-4044-a4fb-effcc8ffacdf/70231020461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e3e18bf-d30e-42c6-9c5f-d0486e6c323a/www._sandiegounified._org_primetime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d35bda-402b-44e7-ada5-70b0b9af18a8/bodyslide_fatal_exception.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AE 5168 bytes
SHA-256: 13f480544967548488c8cebafc94283a44d04f2e3bda1c0dce48c9617d1e4688
font_01_sfnt_off00007548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7548 12544 bytes
SHA-256: 7cbafcc2b535dfa58351ff697d957f049d9ab8456d0b0a139db706f55c611d94
font_02_sfnt_off00009d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D5F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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