Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd78771859be80b4…

MALICIOUS

PDF

52.7 KB Created: 2020-11-05 01:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: d81a9af610bbf1c321618b7a64acf16c SHA-1: 908091a2ded38a8ed2c081f6426536c80950a31a SHA-256: bd78771859be80b42d8736639d16167e01041732d1bf8b3bcd4ae4e2c5d0481a
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=rock+and+roll+hall+of+fame+nominees+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413007/normal_5f93a3968e6c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5f96da93330cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6408/9496/files/71040563001.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/80567452547.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/24485821580.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/bogowiborojosivanogifa.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/ratumutujapotusano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a02d8524-e5ae-4e90-9cc5-2ff4e4bcb434/66246106038.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/76785709835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9389dcb8-c11b-43d1-8f26-269f6ab97850/permutations_and_combinations_worksheet_answers_with_work.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/phim_han_quoc_hau_due_mat_troi_tap_1.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/breathe_in_the_heights_sheet_music.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_off00008ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC9 5608 bytes
SHA-256: a9f17abd3730fb0b6be11d7cc6da497df77da0efe1344ec8e0fbf9800bf76770
font_01_sfnt_off0000a1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B7 10592 bytes
SHA-256: 58d7f7cbfbc509c8621cb0fa972ef73d1cbb16db20d0320180f9391b00fef2c7