Malicious PDF — malware analysis report

Static analysis result for SHA-256 1539a174aab77a03…

MALICIOUS

PDF

33.0 KB Created: 2020-08-12 01:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 09e600cc34bb1062676b9868dd313b0e SHA-1: a0f230701438dced364bb8455011bdcb4b76da2f SHA-256: 1539a174aab77a0318f9f4446057b1dccdcd50232f460d030e2374c1564c0ccf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external PDFs, many of which are hosted on Shopify and appear to be part of an SEO link farm. The primary redirector link, 'https://ttraff.cc/pify?keyword=automata+and+mechanical+toys+book+pdf', is flagged as malicious. The document body, though heavily obfuscated, also contains this malicious redirector URL, suggesting the intent is to lure users to malicious infrastructure under the guise of a free book download.

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.cc/pify?keyword=automata+and+mechanical+toys+book+pdf In PDF document text
    • http://files.mattduffybaseball.com/uploads/1/3/1/3/131380786/2b6f90e42.pdfIn PDF document text
    • http://files.artistiquedanceacademy.com/uploads/1/3/2/6/132681460/nasogize.pdfIn PDF document text
    • http://files.tylerputnam.net/uploads/1/3/0/8/130813782/bujojopakusa-tevoziliwoxo-kijosupula-vedev.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/1/0433/9138/5758/files/nofizoditosiravobijefujed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0942/5056/files/meaning_of_social_development.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2363/7399/files/junuwasomaxuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0224/7838/files/9940599816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8570/9987/files/vajutipuwib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/nitotupalasopixil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/vanilla_ui_plus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/83654913578.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 5

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_off00004390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4390 5596 bytes
SHA-256: b3425106c539ee2ad4e66106909e29ff306889419d255dec234ea72f82cc839b
font_01_sfnt_off00005672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5672 9696 bytes
SHA-256: 5e38cfe89e7cf1bb06e782d6305f54764e1650fd00156c1b848e49e9b42b3eba

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