Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ddb60ea03dacb02…

MALICIOUS

PDF

83.3 KB Created: 2020-10-28 14:36:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f9662a9f98fae898aaa6f9a2a21c6af5 SHA-1: 382a2cffb855a031b4d760e078e26c451ed1eec6 SHA-256: 9ddb60ea03dacb02ca013fd27b4a008cb785533c9f5da55495f897257ef09c7e
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 heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. The embedded URL is directly accessible within the document body, suggesting an attempt to redirect the user to a malicious site. The ML classifier also strongly indicated maliciousness.

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://ggtraff.ru/aws?keyword=oedipus+the+king+full+text+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f8d6105e1dbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371497/normal_5f956ad42a945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371003/normal_5f9913a78ffb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390095/normal_5f8f6df6e0e41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_5f9829bf06779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374542/normal_5f8b8ee019488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390660/normal_5f9204636d9fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f87083e52e10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_5f882ae8700bc.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/dugefa.pdfIn PDF document text
    • https://s3.amazonaws.com/suzeduselu/fomusamivupakokifem.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/concepto_de_insuficiencia_cardiaca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1c2ce0-4d2b-4d0d-9da7-f26c755c0179/10321718677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d4b702-51af-47a7-b764-77aff5d69a94/54028604525.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/skf_bearing_number_catalogue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/553ffddd-6831-4635-b0ab-7ccdf3d20cbd/91793621154.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/jobitiguvurup.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/bapopubewefafizosi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/budget_2019_highlights.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/silisanexazizubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/313155f2-6bb2-4487-90e2-6cfb54ab1b92/kupinusuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/75886986277.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/calendario_laboral_2019_nacional.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32b3a405-7750-411e-b557-5ed833c2eda3/53007964347.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_off00010ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB8 5156 bytes
SHA-256: 015979fc6e19eaa91f4c5509ac59abe0c50af7a2a51d5237b53ad23ceae9392c
font_01_sfnt_off00011c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C44 10376 bytes
SHA-256: 171b1607b7f652a200e4486c733b8342df2cac3b0440d6c05e73c7682bbae8ac

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