Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6208ca0d87c8fb…

MALICIOUS

PDF

124.3 KB Created: 2020-08-06 19:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 540ea51997481898e65879c9aaba052d SHA-1: b34399e1cac4d912860546ccf5b18220e3d069e4 SHA-256: 7c6208ca0d87c8fb51fd4b6904cdcac256ce0e5d5ed25af8d7d4e72452ab266b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links designed to appear as legitimate book downloads, but they redirect to a known malicious infrastructure at 'ttraff.ru'. This SEO link farm tactic is commonly used to distribute malware or conduct phishing. The ML classifier strongly indicates maliciousness, and the embedded URL confirms the redirection attempt.

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.ru/pify?keyword=tales+of+arabian+nights+book+of+tales+pdf In PDF document text
    • http://files.megtinsleymft.com/uploads/1/3/0/7/130775760/2156743.pdfIn PDF document text
    • http://files.layzd.com/uploads/1/3/1/6/131636692/7135544.pdfIn PDF document text
    • http://files.listerpartyrental.com/uploads/1/3/1/3/131384604/vipagerutalujeg.pdfIn PDF document text
    • http://files.wccustomboats.com/uploads/1/3/0/8/130873826/vemusonidame.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/1/0432/6434/4219/files/25411564048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6915/3181/files/nudeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4032/6300/files/kalibudaxidigud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/48723250937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/nodozukam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/30043394949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/14506695927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/guwejodefazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/13089649213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/kosadefeviwikipusegigera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9313/9364/files/66992146669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/role_and_function_of_central_bank.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/xosunusofebikixuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/suboduruzovinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0413/9416/files/tumisuzedozari.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001b65c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B65C 25028 bytes
SHA-256: f11110529f06a591381b872c974faa56d82fb471ded0968cc584ba6e46525adf
font_00_sfnt_off00017bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BD6 5456 bytes
SHA-256: 9afa556ef91ca148b2d65a775ceec6025799ad7a18b110368e8523ccee01475f
font_01_sfnt_off00018e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E52 12432 bytes
SHA-256: 7b8559738e0420c8f9f494b585e49751aee0ed989368229f70aa90aea96aaa4d