Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd21668a4828cd46…

MALICIOUS

PDF

40.9 KB Created: 2020-08-13 23:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6deef0efe290e67bf9ce9fde5e10cc18 SHA-1: 3c8367d2c270565eb90df0d2a61780fc6903dad3 SHA-256: cd21668a4828cd46b9597d2464d71843b29b7e57b114aa84b77477bf4b4a09ed
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to other PDF documents. The primary URL, 'https://ttraff.ru/pify?keyword=nelly+dilemma+excel+spreadsheet', is flagged as a malicious redirector. This suggests the document's purpose is to lure users through a series of links, ultimately leading them to a malicious destination. The presence of a link farm and a malicious redirector indicates a probable phishing or malware distribution attempt.

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=nelly+dilemma+excel+spreadsheet In PDF document text
    • http://files.jonathanacollura.com/uploads/1/3/0/7/130740217/metupuxofi.pdfIn PDF document text
    • http://xigubavum.performancevolleyball.ca/uploads/1/3/0/7/130776760/givifozobekaza.pdfIn PDF document text
    • http://xofewobu.fridayflyfishing.com/uploads/1/3/0/7/130776208/xakaxi_kilerixuzile_dipogafusu_mufuvima.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/1/0428/9835/8432/files/32377204601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/49740939834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/94464465884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3017/4113/files/cet_2020_karnataka_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9054/2743/files/vijilusitupofatenavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/setapikukogebofigatetoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/fugikutebip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5720/8731/files/69804076383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/blood_magic_binding_ritual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/tanab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/5852813283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2885/6477/files/15835315797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1905/7826/files/pedabejefejegagidij.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_off0000603d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603D 5452 bytes
SHA-256: bd2547cf4101ac17fc78a11891956d1d8cbd35885948d0f81e2fac9e0ea16290
font_01_sfnt_off000072b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B0 10620 bytes
SHA-256: 12a7799cdddd4760fb67d716d4f545d19f8146495b27fd7aa578b2e945815a74

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