Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c96caa82212fac…

MALICIOUS

PDF

98.3 KB Created: 2020-08-10 03:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c90a6ec0f3203701254fd91ccfa8e3c1 SHA-1: 26036cb7f5eadab3328330c5760fd1b5d06c7b54 SHA-256: 66c96caa82212facc66cae6e803710e7a6a3f6bdd4c2b9f6cf9ac397d2dcb160
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 downloads, but they redirect to a malicious domain (ttraff.ru) via an SEO redirector. This indicates a phishing or scam attempt, likely to harvest credentials or deliver further malware. The ML classifier strongly supports the malicious nature of this PDF.

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=immunoglobulin+structure+and+function+pdf In PDF document text
    • http://files.restonsusedbookshop.com/uploads/1/3/2/6/132695321/ziduka-fiwin.pdfIn PDF document text
    • http://files.materialise-creativity.com/uploads/1/3/0/7/130776684/kafumawudufewewag.pdfIn PDF document text
    • http://files.orenshabatlaurentblog.com/uploads/1/3/2/3/132303315/573650.pdfIn PDF document text
    • http://files.guysalvidge.com/uploads/1/3/0/7/130776484/3943736.pdfIn PDF document text
    • http://files.ravenlawson.com/uploads/1/3/1/4/131454620/fupapefesekin.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/1/0428/1607/7991/files/network_marketing_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7883/5606/files/history_of_great_britain_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/retib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5959/0806/files/alison_diploma_certificate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/cnc_machine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3866/8965/files/biodiversity_conservation_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/vopofiletigikoxikulodupub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/vowakanilokopuliferedagov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2143/4023/files/el_cazador_de_historias_eduardo_galeano_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/tidagixup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/63594643004.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14454 5552 bytes
SHA-256: 55a93d6daf9c9f607190eee73c6260d64b6e83a701f66300c6c70b059ad56c69
font_01_sfnt_off0001571f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1571F 10724 bytes
SHA-256: e17e29d2970502be63d6ca7f8a9d20804b356bd353ba530d9062497037685a00

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