Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b23879a4e5b2960…

MALICIOUS

PDF

35.5 KB Created: 2020-08-07 13:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce7d82b2938b9c6597ce04806126e677 SHA-1: dd3634a8344423876332d8fb16ef61f72f0da1d4 SHA-256: 8b23879a4e5b296091d2807dca002566898088460ff41fceb718faf7de3f42fe
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.cc), disguised as a free download lure. The ML classifier strongly indicates maliciousness. The document body text and embedded URLs suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

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=archaeology+essentials+3rd+edition+pdf+download In PDF document text
    • http://files.hawaiistuco.com/uploads/1/3/1/8/131871642/kasezofakeji_paliluwubezol_volodozo_bafim.pdfIn PDF document text
    • http://jozuboj.cvqgvt.org/uploads/1/3/1/4/131453990/bopepodinane_fokizik.pdfIn PDF document text
    • http://files.mypdxlifecoach.com/uploads/1/3/0/7/130739648/xesavome.pdfIn PDF document text
    • http://files.dinas-decor.com/uploads/1/3/1/6/131637014/pizazexon_jomuxakura_fosukafuk.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/1/0429/6232/1567/files/materialismo_cultural.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/nobuvufisazibasutajalibub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/nozigiwapatafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4818/1666/files/54772957932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8935/4149/files/49340790733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/lorovukolefepazoxupumur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7714/7547/files/27512906622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/22103929532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1722/3847/files/valid_us_addresses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/61396565589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/11th_grade_chemistry_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/82226444154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/34768036152.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_off00004bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF8 5764 bytes
SHA-256: 236930f128b6d25c37ab0ad1dd7f11d916ef44ffe1ccd0b208764bad354585bc
font_01_sfnt_off00005fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAE 9680 bytes
SHA-256: fde3fbf4ef584d4e083d45bf2169dd85e2ce5b8971f7001473308613463dc2e7

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