Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9ff4769c9b2640…

MALICIOUS

PDF

36.9 KB Created: 2020-08-06 20:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3446c9ce0dfbe813956180165d6d09bf SHA-1: 13fcf9a560678dcd053c22d0ec9d2d9f0edfe843 SHA-256: 9f9ff4769c9b26406ba6c277471ee3885f52fabe7849645c6dd935f79c2fe69d
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous URLs, with the primary suspicious URL being https://ttraff.ru/pify?keyword=casio+fx+991+ce+x+pdf, which is likely part of a phishing or malware distribution scheme. The presence of a large number of embedded links suggests an attempt to overwhelm or confuse the user, or to leverage SEO tactics for malicious purposes.

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=casio+fx+991+ce+x+pdf In PDF document text
    • http://files.newbusinessaccounting.co.uk/uploads/1/3/1/0/131070872/bibosujadegovawevo.pdfIn PDF document text
    • http://files.monsterhub.org/uploads/1/3/1/6/131606533/2897904.pdfIn PDF document text
    • http://files.thepeoplesbookkeeper.ca/uploads/1/3/0/7/130740490/rasidaraveded.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/1/0441/0766/1464/files/faiths_and_pantheons_3._5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3031/4133/files/9360463584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7202/7814/files/67857699564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0875/3827/files/87827381748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3976/0285/files/systemic_anatomy_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2041/1303/files/pilamurosepuwakubedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7272/3875/files/92013882150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9982/3016/files/75502873276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/troy_bilt_bronco_bagger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3117/5063/files/fixajexurepidodalefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9334/4924/files/academic_essay_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/93765951251.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_off00004fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FD4 5204 bytes
SHA-256: 20141fe9cbcd006dfb68477211c49366ece9c3ed6fb2f6092dbfbd930459feef
font_01_sfnt_off000061a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A6 11484 bytes
SHA-256: bbbd1bbcea37e17b6e691b504c9afda5cc746bbd122091b9b3ae5c485364c98d

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