Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cff72cae1ea8780…

MALICIOUS

PDF

45.5 KB Created: 2020-10-26 21:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 252e57a6aceb936593151f7eae00d23a SHA-1: ca7cf9a57544b6b73c1f2f3127926445336db85c SHA-256: 2cff72cae1ea8780cc1cc03254c1bc55eb5ebe07da340a2d38d76eb88ea43d84
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a search query for 'terraria world viewer'. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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.club/123?keyword=terraria+world+viewer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f9402b4c5204.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/83e80595-bbf3-474c-b9be-806bd445a1bd/tipos_de_tinacos_y_capacidades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b589be-dd9f-4587-bae3-71adb10f394f/35480555211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37256fec-0c9a-4927-a81f-b19543adde2c/48260727579.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/29887375027.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/adobe_signature_not_printing.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/brucellosis_pathogenesis.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/dalasake.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/castelnuovo_tedesco_fantasia_op_145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/188d8096-3859-45a2-bcf5-9fce1f1f5d03/mesa_boogie_tubes_6l6_gc_str_430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80581b5a-a08c-43fe-a3cc-7bf0ab03f7f3/thin_ng_tng_my_th_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cebf847-9d27-4336-8563-28102aefc09f/44205817522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecf7a0a1-b38f-42e0-8b8b-f7714c8aeec4/bujubipikumejuwofaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7806/7393/files/captivated_by_you_read_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3357/5075/files/30429022797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7746/7289/files/theory_of_computation_book_for_gate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8855/9782/files/murupefo.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_off0000714c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x714C 4744 bytes
SHA-256: c6eab5678382edddbf0e209306b457afc388cb1450b85c07fdba8ca3003d9e13
font_01_sfnt_off00008190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8190 12344 bytes
SHA-256: a52ded7cc197f99d8d7fa05b10552036df1aad1d09a5c111879399e65200ee23

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