Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25a49c709d0b0ca…

MALICIOUS

PDF

41.2 KB Created: 2020-08-06 08:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85b605a3fa558db187c3ff8fba3571ce SHA-1: e2d6c289662f5e5f45f88136cfe7e4941c2f329a SHA-256: d25a49c709d0b0cab8950c0d4f2ee466926891e5cbd5816b75e3577a62fa721d
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.ru. This suggests the document is designed as a link farm to distribute traffic to malicious sites, likely for phishing or malware delivery. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is the primary indicator of compromise.

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=acgih+exposure+limits+pdf In PDF document text
    • http://files.limassolsportsmassage.com/uploads/1/3/0/8/130874129/laxuvovobopekidom.pdfIn PDF document text
    • http://wutuwu.unorthodoxmotorsports.com/uploads/1/3/1/6/131636612/4e82f50191.pdfIn PDF document text
    • http://files.shhschoir.org/uploads/1/3/1/6/131636697/7553665.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/1/0435/2750/4024/files/bivutuxuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/bibewoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2446/3525/files/69490757761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9861/0591/files/99307664260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/98437083339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/rarik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1854/2504/files/66418597264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3851/5095/files/38451192068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2707/1130/files/44576576672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6141/8913/files/cezar_roberto_bitencourt_tratado_de_direito_penal_parte_geral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6345/1549/files/puxapunopakunanubumojip.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_off00006242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6242 5416 bytes
SHA-256: 0eb20765a99a7ad89d94d6e4ac90a79cd5a2c2c94a2fb76dd4e053bd53c1bc34
font_01_sfnt_off00007491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7491 10544 bytes
SHA-256: 4482ca75f85141b52409c2c02e83705ffccac04aa8b952a4efb9fd0b5d411e05

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