Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9d04d43d0dbe6f…

MALICIOUS

PDF

42.1 KB Created: 2020-08-08 11:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 831e3f4783d8ee149d40df62d2299864 SHA-1: 2f101c1b374f427c2951d4d15c5636f3742f5018 SHA-256: 5c9d04d43d0dbe6fe07b8d0296320099da436d3abc11b505ec0281b0a52254ae
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector infrastructure identified as malicious. The document body, though heavily obfuscated, contains text related to a syllabus and a URL that appears to be part of a link farm designed to attract clicks. The primary malicious URL identified is https://ttraff.ru/pify?keyword=bams+syllabus+pdf, which is flagged as a redirector.

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=bams+syllabus+pdf In PDF document text
    • http://files.deltafireprotection.com/uploads/1/3/0/7/130776148/3182238.pdfIn PDF document text
    • http://files.needhamconcertsociety.org/uploads/1/3/1/4/131437157/945f98e54.pdfIn PDF document text
    • http://files.witnesshimnow.com/uploads/1/3/1/3/131382982/415181.pdfIn PDF document text
    • http://files.getpatenthelp.com/uploads/1/3/1/3/131380482/weravorado-majufite-zojijanu-jelexujekes.pdfIn PDF document text
    • http://files.myladieparadise.com/uploads/1/3/2/7/132741429/13db94266.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/1/0432/9573/5976/files/vibusugupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5970/8058/files/jaxebabegasovul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/malaria_complications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/11089871434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/jibizewavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8293/0593/files/fagavekemorinazigozudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/gajowexasure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/25253101074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/bopominojebapete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/41440712279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8886/2622/files/ufw_status_inactive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/94090288005.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 4

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_off00006738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6738 5380 bytes
SHA-256: 9b8c120125335e2ab5d139231782440cde47df8a79010021bce02eae149e90a4
font_01_sfnt_off0000797b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x797B 10080 bytes
SHA-256: e954ee7d1e303b087a1835a5af9cb46ce0b6d390d8796412cc11483388c8c37d

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