Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b745d05bbebba9b…

MALICIOUS

PDF

33.5 KB Created: 2020-10-09 00:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2c5d6476979257803344c5be951174a8 SHA-1: a537671efe1bcff16c748463d85b35c6c44d61fe SHA-256: 4b745d05bbebba9b99f466c1802dd83703911598b4252f69224178252dfa3aaf
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.club/pify?keyword=miniature+schnauzer+for+sale+craigslist+alabama In PDF document text
    • https://site-1044191.mozfiles.com/files/1044191/72220371609.pdfIn PDF document text
    • https://site-1042103.mozfiles.com/files/1042103/20294607020.pdfIn PDF document text
    • https://site-1039381.mozfiles.com/files/1039381/nipat.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/talefubotovuxe.pdfIn PDF document text
    • https://site-1036731.mozfiles.com/files/1036731/88126958759.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/1d46363b-590d-4196-b150-110b2a1b8d6c/semalulusufowoxuluvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a358fd-2947-4c41-b640-46a1f0cbafc0/vezoxuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acd9751b-f81a-4a02-9a27-50188fd7231d/63087026558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/841f5721-92a0-47a8-867d-21b7fccac9cb/69266122561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9549/6606/files/origami_owl_instructions_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3830/0568/files/notafunesegozekafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0206/4806/files/mario_party_island_tour_minigames.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9167/9639/files/mi_propio_auto_chapter_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/properties_of_carbohydrates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0355/9583/files/pepwave_surf_soho_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5648/2472/files/jelelodaga.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_off000047c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47C2 5488 bytes
SHA-256: e34b7bb78ec4032e61cfea162cf17d3d1f18334d61978a00456762b7b2d7d8bf
font_01_sfnt_off00005a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5E 8940 bytes
SHA-256: 672e0081c341ee445b4a48af3980c1b5a135b768ed700260e92159b9769488b7

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