Malicious PDF — malware analysis report

Static analysis result for SHA-256 51d20e63a39ef075…

MALICIOUS

PDF

35.5 KB Created: 2020-09-18 08:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a0b95517a4ba03ac42caafaade5a4218 SHA-1: 8b930f04089855b1ddfa29eb0e9792e8aeda0392 SHA-256: 51d20e63a39ef0757b8f895b63b5d0acb1d22143f96a1cd592e63c5895198b23
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=beowulf+kenning+worksheet', which is flagged as malicious. The presence of a link farm heuristic further suggests a malicious intent to distribute or redirect users to harmful content. No scripts were extracted, and the PDF structure itself is the primary vector for the attack.

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.club/wix?keyword=beowulf+kenning+worksheet In PDF document text
    • http://files.allanenv.ca/uploads/1/3/2/6/132681212/4c31132e4576d.pdfIn PDF document text
    • http://rifid.mezoopets.com/uploads/1/3/2/7/132740837/nofitekilipew.pdfIn PDF document text
    • http://guxidu.itopiacoaching.com/uploads/1/3/0/7/130775350/zixonupuriso_suboviposoxas_losidari.pdfIn PDF document text
    • http://files.gabriellefreiretherapy.com/uploads/1/3/2/7/132740836/vijinoxasud-gebonulaker-lifupoxiso-pamitojani.pdfIn PDF document text
    • http://files.nariatlantablog.org/uploads/1/3/0/8/130814110/6600358.pdfIn PDF document text
    • http://mafoxu.bizexpertz.org/uploads/1/3/0/7/130776298/jogokabew_ditajiw_kokifudutiz.pdfIn PDF document text
    • http://files.circleofapparel.co/uploads/1/3/1/4/131453384/a288e1ee059f.pdfIn PDF document text
    • http://vijawenez.supercollectorcatalog.com/uploads/1/3/2/8/132814930/sames-govazijo-minifet.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/1/0435/5745/3985/files/james_e_talmage_articles_of_faith.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7749/1093/files/apnea_de_sueo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40323832667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7748/4196/files/76436302766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/0425/9492/files/pokewofadutefafu.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 6

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_off000048ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48AC 5024 bytes
SHA-256: ab335be12201e4ae9a47fd9e6b3ad0e4da0bd335b5c47755d3b3414316fd0a80
font_01_sfnt_off000059dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59DD 12276 bytes
SHA-256: c19933dde3afb7ee6ca7cb903b1fc9234c8319e32f13ae2edb6ebf06ba150139

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