Malicious PDF — malware analysis report

Static analysis result for SHA-256 970e96de5dbf27e9…

MALICIOUS

PDF

42.4 KB Created: 2020-11-04 05:50:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c2a2bfdafd34fc9b5c78f536cd763fd6 SHA-1: 3b25587dd786b1659eb956a138bf65782e02ada2 SHA-256: 970e96de5dbf27e9c854c6a1ddeae2ec3358ca4d0df4e5ccd12a079e53ec617a
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?keyword=yoai+books+free+online'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body indicates an attempt to lure the user to a harmful site, likely for phishing or malware delivery.

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://gettraff.ru/123?keyword=yoai+books+free+online In PDF document text
    • https://jazexupojofon.weebly.com/uploads/1/3/1/4/131409098/f54668ef5.pdfIn PDF document text
    • https://lesuwigiwojan.weebly.com/uploads/1/3/4/3/134309114/tibapimobiw_lozoxadusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_5f8be712761e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413713/normal_5fa1a4532b9c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454041/normal_5fa05a7b42f97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_5f99e8d41a598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452400/normal_5fa0c15a82592.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/memul/animals_and_their_babies_flashcards.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/vumonilizew.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/31675743032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58156d26-1589-4d20-b34d-bd34dae5f8e6/lebenazovivopin.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/99854475991.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/dart_tutorial_for_flutter.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/lurufixilob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9cb087-39ed-40de-a002-fcd0f8ae8f2c/lolimolojamoroxivit.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/psat_answer_sheet.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_off00006a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A10 4924 bytes
SHA-256: f215d78537125d814e946f8a8cb226a4d9cbc68964b5d394aa907f4bae539f61
font_01_sfnt_off00007ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE0 10056 bytes
SHA-256: 75ca3e33a437794162c0aa21b97c929f4d1bf1a51a7b467dbbff7997fc19f60a

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