Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d82cf2e3d3ac28f…

MALICIOUS

PDF

39.4 KB Created: 2020-10-27 22:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: df5fc836147926856f3d629da97fc3b2 SHA-1: 4a66c042933969c23c21b2d1b9a9345d18135af3 SHA-256: 7d82cf2e3d3ac28f9b681c15bad434fa633ae4160b14cdc42f9bb55b103c9c1d
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 indicating a malicious redirector link. The embedded URL, 'https://ttraff.link/123?keyword=debate+sentence+starters+ks2', is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment that this file is designed to lead users to harmful content.

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.link/123?keyword=debate+sentence+starters+ks2 In PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/fopumudefixaka.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/jibigamefomoni.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/52826de388de076.pdfIn PDF document text
    • https://vojimefijizudi.weebly.com/uploads/1/3/4/3/134310580/fezanopeba.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/subud/49780298551.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/learn_fingerstyle_guitar_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/24808654087.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/bordered_hessian_matrix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3669/6995/files/59711272522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3357/5075/files/marketing_3.0_philip_kotler_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8366/8392/files/element_50_inch_smart_tv_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4884/5471/files/ielts_listening_recent_actual_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf602162-e5bb-4c20-bdf3-5de99efaf55f/wudoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92006004-26f4-4058-946f-18328a9e564b/famille._ac-_montpellier._fr_ts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2329d51-00fb-44fa-a0e4-f81cc4cdad96/koxogagiwal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97a17f56-8a51-4e4e-94b8-48251b861399/fijikarufugokigilejafupen.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_off00004ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF2 4724 bytes
SHA-256: 210c219b4cc131d8df15eef4348305bd73561f57f13b4b729ffeefa4db4a3a67
font_01_sfnt_off00005f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F02 10272 bytes
SHA-256: c735c146cc402666358e8d5ef1c93a53af3dc7c9f1b5b2b29469c52437ffecf1
font_02_sfnt_off0000824b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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