Malicious PDF — malware analysis report

Static analysis result for SHA-256 1531a544c9ba38dc…

MALICIOUS

PDF

37.9 KB Created: 2020-08-19 13:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fc8951daf6e2d4a1caa25202c32a5a0c SHA-1: 768fa4324eb8e07c803ee69ae31240c40269d6b2 SHA-256: 1531a544c9ba38dc19e6cdcd7fb0b983b563e4fb83626ee7168e648f27b609dd
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. This suggests the document is designed to lure users into clicking these links, potentially leading them to phishing sites or malware downloads. The presence of a large number of external PDF links further supports the link farm attack pattern.

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=cursive+writing+alphabet+template In PDF document text
    • http://laguvodit.ignaciocarballo.com/uploads/1/3/1/6/131606289/c13b5d4c.pdfIn PDF document text
    • http://files.wilbanksreptiles.com/uploads/1/3/0/7/130776073/73091842d8ced.pdfIn PDF document text
    • http://files.lizstory.com/uploads/1/3/1/4/131453395/7688503.pdfIn PDF document text
    • http://files.rachelsarasafer.com/uploads/1/3/0/9/130969241/lekadex.pdfIn PDF document text
    • http://files.assistancedogs4all.org/uploads/1/3/0/7/130738681/zimuxe_demulawezi_notebumigezodi_waposapus.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/1/0437/6225/3982/files/somadojarixikijajomeritu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3582/0185/files/adeept_ultimate_starter_kit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8037/files/38725314201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8130/1158/files/formulaire_certificat_de_cession_de_vhicule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2210/2178/files/problem_based_learning_steps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2277/6477/files/xukefabiguroko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8415/9903/files/canon_mf210_driver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8292/3676/files/61898694644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/86902714371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/ergonomics_furniture_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3332/7776/files/saxoxanaduvelutava.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 7

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_off000055dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55DD 5432 bytes
SHA-256: 7e3cd654978f004f26aadd5eaebf2280b961adcc9a74e56246ef927ed3761d3c
font_01_sfnt_off0000683b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683B 10080 bytes
SHA-256: 91ad5197f21ec79767ac9a0108e6ca9d53ea22b0969f76d9455763e48f7f9e90

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