Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fafa5baffd24ce6…

MALICIOUS

PDF

41.1 KB Created: 2020-11-05 12:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ccb0ca364635f92fbb7677a96cdbf762 SHA-1: 2dbbdaddca8eebc4e5bbc2f9f3fcce19772d1896 SHA-256: 4fafa5baffd24ce6e49a3f0d17e7567336e94059dd65d6b5468e89b481f2b913
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.cc/123?keyword=lyrics+to+you+can+fly+from+peter+pan In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_5f9751f0a2bf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f97b36827a43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426270/normal_5f99a7c2bcf17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421462/normal_5f9918ba2d590.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/wizuluworafid/46032108386.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/beat_the_boss_4_cheat_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/445b29fe-9c1f-45f7-ade1-56baafb4ac14/38393450849.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/connex_4300_hp_400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94dd958a-3768-4c0c-ad2b-65e2ad2d001e/38238443449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8339/1660/files/studor_mini_vent_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/agricultural_extension_and_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e426cff-09ca-4cf5-a8f9-fa5d19a1dbdf/savibabaremewotametax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/389d41b5-4979-4b8a-88c3-d035be4b9cc4/metodos_de_depreciacion.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/dacor_double_oven_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6127/9423/files/paginas_amarillas_cuba_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/39092887761.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_off000063d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D2 5204 bytes
SHA-256: f8d66c860236b4be5a55da71c0ad0babcf059173812473734469d763172a9b5f
font_01_sfnt_off00007585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7585 10024 bytes
SHA-256: 03d92e1527d4927a4b4c0d6adb640ab4e130cf496d6f91a6cae291734a7aceb1

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