Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3807e18494b8faf…

MALICIOUS

PDF

45.9 KB Created: 2020-10-27 09:05:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: eb2b81772f780fea67f284e147c54037 SHA-1: 79736db50be9d6bfb08020b9dab14d02759d50a3 SHA-256: e3807e18494b8fafde899c9a2fa4a96dd66b0c38dc9018820674061d83c7840a
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it is a malicious redirector, pointing to the URL https://ttraff.link/123?keyword=arnold+the+encyclopedia+of+modern+bodybuilding+pdf. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is likely intended to lure the user to a malicious site, potentially for further exploitation or credential harvesting.

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=arnold+the+encyclopedia+of+modern+bodybuilding+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_5f93710cef4bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f8ebcf5c3aa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f90b613268c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376854/normal_5f9451e77942a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402933/normal_5f97ae677a9d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f8e0406aa387.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/fuzujat-kazupupodok-wused-kopajiza.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/6931524.pdfIn PDF document text
    • https://mulodunewumil.weebly.com/uploads/1/3/4/3/134314444/fufomolotijawu.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/5fa49904-32e7-4a59-a630-dc211dcb1a5c/87251178722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeda5554-0507-41fa-91a0-0c9b16c81066/97896558188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b71d05b7-bef5-4241-85d5-389c272eb3fd/78834556136.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/ansi_b16._5_class_150_flange_dimensions.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/telecharger_catalogue_schneider.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/43062990971.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/ctet_2019_previous_year_question_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/28051195302.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/40th_bcs_result_2019_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/addressing_barriers_to_learning_book.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_off00007283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7283 5624 bytes
SHA-256: 6732ce74dfa1070a57f709b751616a6fc089479c55f4bb83fb42012ae097e833
font_01_sfnt_off00008573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8573 10660 bytes
SHA-256: 59c0dd1a85ee8342617c3a7725537cfe3883b34440531cd13caec824f8e9b965

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