Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f089b99d1632f55…

MALICIOUS

PDF

42.5 KB Created: 2020-10-16 19:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 3d71b8fbb2ca0fb2151fb0c72bdbadac SHA-1: 6a7c00255a5a1ac19cf9a5003ddea320bc6a4976 SHA-256: 6f089b99d1632f55ca7666877d7eb8992ef9a0830fb129c05465c6b9a9a5b69e
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=android+tv+4k+youtube In PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/babatigativanu_rugiwozazo.pdfIn PDF document text
    • https://zidabowejixu.weebly.com/uploads/1/3/1/1/131163559/mubexufiwesugeg-guzukazokisozoz-wuvux.pdfIn PDF document text
    • https://jozokuxig.weebly.com/uploads/1/3/2/8/132814463/puweweni.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/4733702.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/dozafawegikuxoto.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/3cb113af6.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/milowotuni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_5f881fe9f105b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369143/normal_5f88befc2bae2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_5f88e54174f16.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/1/0430/7527/2855/files/ecuaciones_logaritmicas_calculadora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2794/6398/files/66733310977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3005/2005/files/47483521848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0714/6146/files/rejuzepini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0980/8797/files/73971640931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3062/3894/files/photosynthesis_diagrams_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3840/6806/files/dark_souls_3_randomizer_ps4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8795/4073/files/vutizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8167/0042/files/xopotikuxad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0487/6727/files/25320091752.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_off00006aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAC 4840 bytes
SHA-256: 5446b7191c221ff0589e3d03c8877167c88782dca3be6960c91c07f1deae6873
font_01_sfnt_off00007b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B44 9920 bytes
SHA-256: 459af301ba9e359e076c5d3cd3ecb8436d3892f4c68c0abce8966968728c11f3

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