Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a8f40d0e364c82…

MALICIOUS

PDF

42.9 KB Created: 2020-10-30 20:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: eb262b60cf813b10a4cfac1dff0c8062 SHA-1: af6b0246a088d65808d94b1b952d7de58da54150 SHA-256: 65a8f40d0e364c82c77979dc25bc209b0a56b2527d88a32ab307416d9e0b8a03
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=aurora+borealis+simpsons+quote In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_5f97763b01ead.pdfIn PDF document text
    • https://waxojokizubow.weebly.com/uploads/1/3/4/4/134482073/xuzutuzo_zabuw_jovune_sakiwatodel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416301/normal_5f9a27f912dcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5f91738e37470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_5f9713d141489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_5f983124b2ea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f8751249b861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f879ec736dae.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/3c0217d0-1b9e-4ea9-80ee-3e1f932851a3/88830090239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af706156-51db-4812-827b-e770c0717bed/debaroxajijufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af328633-b83d-48ba-91db-dce3598c7cf5/intercomunicador_belcom_bdp_2022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9356/6648/files/yoga_books_with_images.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6328/6691/files/in_this_very_room_lyrics_printable.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_off00006930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6930 5220 bytes
SHA-256: 9a5db5e676206502c1452a53fa271d206f88443fc7b9a3e5c5c8d186fdf471dd
font_01_sfnt_off00007ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD5 10396 bytes
SHA-256: ec1efcc2133ae7d36889add4ceb6c3d6fc36b3a12ffed72f04f306a7a7cf9f9c