Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0ee5c5f1cd50ce…

MALICIOUS

PDF

40.8 KB Created: 2020-07-20 14:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99b798d4a7949da0dddd73c417d20944 SHA-1: 8fa0b34e252ebb6af07be8a244af50404ffe5db1 SHA-256: dc0ee5c5f1cd50ceb31db63ff4cc0ec235fdb3993bbaf977a60aad122a9d77ab
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 (ttraff.cc). This indicates a link farm strategy, likely intended to obscure the final malicious destination or to distribute malware. The ML classifier also strongly flagged this PDF as malicious.

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=challenge+and+thrill+of+pre-college+mathematics+pdf In PDF document text
    • http://files.groundingclimbs.com/uploads/1/3/2/7/132712120/7432328.pdfIn PDF document text
    • http://files.rogerscitymarina.com/uploads/1/3/0/8/130873717/9516886.pdfIn PDF document text
    • http://files.innovativetruth.org/uploads/1/3/1/1/131164442/975212.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/1/0428/1047/4663/files/gobobilariwonijifuzabusok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5293/3021/files/73740158896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/zatinekuwoba.pdfIn PDF document text
    • https://goxapexuti.files.wordpress.com/2020/07/19684085874.pdfIn PDF document text
    • https://guzuteju.files.wordpress.com/2020/07/moxovozazimorison.pdfIn PDF document text
    • https://legesidubaso.files.wordpress.com/2020/06/49943152786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/buloxoraludexezuxarovekix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zenafepejeviwasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujaxitedidubabupopivup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4624/7332/files/vozadiromejebefaxizujudeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1543/0553/files/33052787423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82505274200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/4090002743.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_off00006225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6225 5412 bytes
SHA-256: 62f9149898ede27922a23f56d7d590878f6b789acc2b0580a2665416b60bd00f
font_01_sfnt_off00007466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7466 9848 bytes
SHA-256: e9f3b7d41edebc5570bfe9085fbf82943e21d3ceca808c5033fd0283e1c88ef8

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