Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd767a7aab1fc8bd…

MALICIOUS

PDF

45.1 KB Created: 2020-10-21 02:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c22469c76018ed5e4076f03997e62047 SHA-1: fe41f5292909afe4a6e1123bbc30250fc2ad52f2 SHA-256: cd767a7aab1fc8bd48ab8e06508216a0572b16d62ebdc2b018ca5ff734dfbb47
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://gettraff.ru/123?keyword=normas+da+abnt+2020+para+tcc+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8712dec2fda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f8f71ef20f59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f8dc581189ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5f8ad14a79cf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f894923b5a0b.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/b2de19ba-4b13-4ed9-843a-967ae1dae187/98828001683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0534c873-ed74-4b41-9f2e-09e3f716c651/73569709595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d2212ba-d8cf-4a92-a211-72a9a197d57d/xobujadabapumosizoxuxexos.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/symbolic_logic_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/calcio_antagonistas_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/tepafavixepe.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/71147615656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c123a266-01e4-4a37-9136-303f7f7ad0e7/libro_principios_de_finanzas_corpora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ee5a5e-62df-435d-a1cf-4932b43e2027/chess_rating_Amazing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9235/2928/files/lodebuziluxakugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0752/7077/files/ootp_perfect_team_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/4891/9191/files/tera_pvp_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4372/3163/files/zopabamezuzaf.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/snakes_and_ladders_board_game_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/33512784710.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/lulugidazoramak.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_off0000701d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x701D 5652 bytes
SHA-256: be0acf41436c118a4358fc8e4cd01ea576abbefe3a13557dad1175df29274eb6
font_01_sfnt_off00008338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8338 9948 bytes
SHA-256: 9168a095db4e8dbad700975b53e5fda3e632e086ed82fdcc9e0c92f06e32e01a

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