Malicious PDF — malware analysis report

Static analysis result for SHA-256 73df60e2e4d5572a…

MALICIOUS

PDF

36.8 KB Created: 2020-08-11 09:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cd5d5177f386647f5f3598d147cacf83 SHA-1: 1457e6a00a2ac7e102d658205cae1a952daae291 SHA-256: 73df60e2e4d5572adda8b6577acb7400cb675e3ed2dec1fea47dde8dc9e6ab7f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that is flagged as malicious. The document body and heuristics suggest a "free download" lure, likely a phishing or SEO spam tactic to drive traffic to malicious infrastructure. The ML classifier strongly indicates maliciousness, and the presence of redirector links points to a multi-stage attack.

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.com/pify?keyword=educational+research+quantitative+qualitative+and+mixed+approaches+4th+edition+pdf In PDF document text
    • http://files.kingstonwestdental.ca/uploads/1/3/0/7/130738596/aa41de0f.pdfIn PDF document text
    • http://files.danielshar.com/uploads/1/3/1/4/131453216/xubopikaje.pdfIn PDF document text
    • http://files.bodegabayhouse.com/uploads/1/3/1/6/131606165/6963368.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/1/0440/1430/5430/files/wobililizufikivawowimag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3756/4839/files/i2c_scanner_arduino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/6811614637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/cello_quartet_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/sakaxodifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/kufabolakedugexugulazar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/73759687308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6635/0998/files/50431680824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7842/6534/files/operating_systems_concepts_9th_edition_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0992/3480/files/xedam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7112/7206/files/dell_command_update_2._4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2230/9786/files/60592972359.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_off0000508c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x508C 5696 bytes
SHA-256: 648be21a5c951a5ed4cfac216aa7658554fd2e8009b1d88d3b3689e9144981cf
font_01_sfnt_off000063c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C5 9944 bytes
SHA-256: f1c4142678b84308d460e4e28cf30c8af668dac57053cc5afbb0bff31e04c0f3

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