Malicious PDF — malware analysis report

Static analysis result for SHA-256 663b9ac58cf0702d…

MALICIOUS

PDF

39.4 KB Created: 2020-08-26 05:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bde3059058a91ee264d9c1ba986e1ab0 SHA-1: 2a485dbadc49eced53de8420cf02587a30c56c28 SHA-256: 663b9ac58cf0702d7f675f9e966993ced4bdc666d6753ee6098b9db9e839ccd4
194 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector service designed for SEO link farming. The primary redirector URL is 'https://ttraff.ru/pify?keyword=example+of+final+year+project+report', which is used to obscure the final destination. The document body, though heavily obfuscated, contains text related to academic reports, suggesting a lure for students or researchers. No scripts were extracted, but the extensive use of redirectors and link farms indicates a malicious intent to drive traffic to potentially harmful sites.

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=example+of+final+year+project+report In PDF document text
    • http://files.marziagaggioli.com/uploads/1/3/1/3/131384071/3410028.pdfIn PDF document text
    • http://files.flo-kelvinfreelance.com/uploads/1/3/0/7/130775228/4109352.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/1/0439/0669/5320/files/jamawafuragijudamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/5625/9221/files/15641671166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3888/3485/files/judefapujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/vagusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9531/7911/files/tokusojosikuxeserikes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/tuziwikem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/suwada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3140/2395/files/95044986062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/41092030407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/webomobituwisumepepaxifi.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 1

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_off000054d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D3 5188 bytes
SHA-256: 41b381cde0c0e43efe4ff49b463310476414b9e3779e3662322f89fd577878f0
font_01_sfnt_off00006680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6680 12860 bytes
SHA-256: 08f1ad29110110c168f48e2e4aae2cbe33be7fc7b2c1062fa89e4c9e63f0e08e

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