Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7a56689eb21e3a…

MALICIOUS

PDF

41.2 KB Created: 2020-10-29 21:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: a3a2fae9ec770c5266fa5b771a823648 SHA-1: 7dd3708e3120caea1077c18ef6d07ba9932d9ee2 SHA-256: ce7a56689eb21e3aaae7fee625ceb63b0221a4d26a0018a263ef1af52fea9171
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.me/123?keyword=dead+samurai+2+cheat+codes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386363/normal_5f932bb96e7b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5f98aa7519975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f86fe7625878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408460/normal_5f925a0ea8769.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/1/0481/7698/8309/files/psychological_and_sociological_foundation_of_education.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9780/9830/files/big_mistakes_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/lifevubuvotaboxinivenep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/the_office_gifs_funny.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/all_android_secret_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/tafsir_al_quran_tematik.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/22613695168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2501/4173/files/single_variable_calculus_jon_rogawski.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cdd58ac-c346-4c3c-aa77-35834712ed3c/mawofupu.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_off00006155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6155 5280 bytes
SHA-256: 30fe8aa8f3b09bdfa1c82f93335b294e2348f681c3ad3f32987ae8e8e89f2401
font_01_sfnt_off00007323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7323 10848 bytes
SHA-256: 555aba2f76e0d5fe3cf4a072dc4d1eef4409179405608a9a78ab7ce63b0f07ff