Malicious PDF — malware analysis report

Static analysis result for SHA-256 de74e884bda29a81…

MALICIOUS

PDF

37.3 KB Created: 2020-11-02 22:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a5765760ca8facd3819626f7209cebe0 SHA-1: 95b9905263bf467473aaf6b8c3c1b519017546aa SHA-256: de74e884bda29a81411da9ae97b31939a5f87eaceade4804debf75a84c8f1f65
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://ttraff.link/123?keyword=2019+2020+hunting+season+wv'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of a malicious redirector.

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=2019+2020+hunting+season+wv In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389816/normal_5f9710d082aa1.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/fibesezati/rebuvelari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/8463/6320/files/98562500978.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/hp_photosmart_6520_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/zokokamu/37063598491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b1b7c19-fcff-4829-a45f-d5932ac70cf2/what_is_the_purpose_of_laws_in_a_society.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/560deead-ef60-491f-8e17-26e3deadf70a/ditumuw.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/49606278998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5932/9177/files/popup_viewer_html.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3544/9238/files/terraria_mod_apk_old_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/90403502123.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/tevetosupabumaguvudinav.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/63494995853.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_off000052d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52D1 5356 bytes
SHA-256: d74e72cf49b8306782061fa569a141b213e6482b846cec60c68e005dc33419f3
font_01_sfnt_off00006526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6526 10404 bytes
SHA-256: 0ab0542d53eb45264a18a060d11af51e4bb94ee943aa79fb75e8066b2f4a66a4

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