Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df5160301936cc3…

MALICIOUS

PDF

41.7 KB Created: 2020-08-20 19:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a320ec1ec23b5c02fef53fa346b97dec SHA-1: bd4347244d6146cb9ee22bc45326f033338570fb SHA-256: 9df5160301936cc3619517970e05d43876b01fa5c8372f34f5494e4e6f77ffb3
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL, 'https://ttraff.cc/pify?keyword=exponent+rules+worksheet+algebra+2', is designed to lure users by appearing to offer educational content. The ML classifier strongly indicates maliciousness, and the PDF structure suggests a link farm designed for SEO manipulation to distribute malicious content.

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=exponent+rules+worksheet+algebra+2 In PDF document text
    • http://files.gabrielledeveaux.com/uploads/1/3/2/7/132740399/dasegewerugebi.pdfIn PDF document text
    • http://files.caffelina.com/uploads/1/3/0/8/130874676/8565648.pdfIn PDF document text
    • http://files.maryjomann.com/uploads/1/3/1/4/131438274/8938062.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/1/0433/6500/7509/files/3034102117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7392/9377/files/5401686069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/8496/7077/files/25608213121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6201/8716/files/joxufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/wevafogin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/fluticasone_salmeterol_davis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7680/4768/files/tigixez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4576/0669/files/mainsheet_blocks_lewmar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/82016781593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5570/2425/files/86343379528.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 8

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_off000063bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BB 5536 bytes
SHA-256: d5a33abe715d8f38e70378574760e8bf5020bf4698c793ea05587c351241e9c6
font_01_sfnt_off0000769c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x769C 10496 bytes
SHA-256: 35ee75fe4b7bb96ccc44d30477305369b6fccccda4956a801e6706761bf99c5b

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