Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4289bf118d7445…

MALICIOUS

PDF

42.6 KB Created: 2020-10-26 01:57:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3a3ba324211b079268e00a1ad425694f SHA-1: e56e2a80fd162af0031cdb9ce9f524f6da1c6239 SHA-256: fa4289bf118d74450a0af1c83872d9cf2feaa5080d896db13ec647f61cef278b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a link farm and a direct link to a known malicious redirector, disguised as archival digitization guidelines. The presence of numerous external links, many pointing to PDF files, suggests an attempt to manipulate search engine rankings or distribute malicious content. The ML classifier strongly indicated maliciousness, and the embedded URL points to a suspicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=guidelines+for+digitizing+archival+materials In PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/6544629.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/bab531a7.pdfIn PDF document text
    • https://rutaluxunenore.weebly.com/uploads/1/3/0/7/130740368/20e96c8807.pdfIn PDF document text
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/kazegojixaxak-dafap.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/somipam.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/neluxerodixenawesun.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/nolasobu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4133ef4-00d8-4278-a4a0-00738e4c335c/kilumiwapefitepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1f7c70-fa43-4609-b3f2-f129094a2029/goxeduzuzusazuresexenaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5197a4a-5bee-49c9-91e7-55616368e43c/a_first_course_in_probability_10th_edition_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde26fd4-1b0c-4e55-a97e-faa8e9dba1f6/98463104203.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/tarikh_al_kabir_imam_bukhari.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/25883270976.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/fodufos.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/cognitive_psychology_journal_articles.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/87181206781.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/bijupoxub.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/the_old_man_and_the_sea_short_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/28006507707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a21a72-45ec-49d1-bf65-25c2d79899c3/24999782587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2507d138-79a1-478a-90ff-5e9764997735/juwumixinuwi.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_off00006707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6707 5576 bytes
SHA-256: 4da6b70f109a37a5bc0ca13ddecff183eee38778df9983a964cc1b7b15d1a7c9
font_01_sfnt_off000079e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E2 10252 bytes
SHA-256: 1a77221907b06c5ce5f2c2f104ffa26545e814444b5d1995d8919a2f229c774c

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