Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b55eb37add94a6a…

MALICIOUS

PDF

43.3 KB Created: 2020-08-22 14:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 47d054136392b9e135500a33ec262e13 SHA-1: 805843352c2fcbefd305ce1bf3830abec1758659 SHA-256: 6b55eb37add94a6a82244fc6e1da307d1626d56f5847307106027392f5687fd4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Leisure activities spanish worksheets' and includes the malicious URL, suggesting a lure to trick users into clicking malicious links. The ML classifier strongly indicated maliciousness, supporting the heuristic findings.

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=leisure+activities+spanish+worksheets In PDF document text
    • http://files.kathryndykstra.com/uploads/1/3/0/8/130874009/xetojez.pdfIn PDF document text
    • http://vidobezaj.connollyspuppies.com/uploads/1/3/1/8/131872149/5631491.pdfIn PDF document text
    • http://zurawo.saltcitydozen.com/uploads/1/3/0/8/130814297/nugovugekewer_jupipupipotiji.pdfIn PDF document text
    • http://files.citycentrechurch.ca/uploads/1/3/1/0/131070112/d2032d.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/1/0431/2370/3970/files/lelorinebotenore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/13255509213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1152/1187/files/donkey_kong_gba_roms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2852/7779/files/tinkers_construct_modifiers_1._12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/xasitidujut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1855/0439/files/10th_new_syllabus_social_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nebedaxogatasimilore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2015/5037/files/vebetunudijituxejamok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/zuzezalozasafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4225/7561/files/character_map_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/sawagamotunabuzagisexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6448/2202/files/34329624859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.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 4

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_off00006a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7F 5144 bytes
SHA-256: 26ff75fa906a3029884b9a365eb80429971ee8a9afdf3527283ed5d8bb09fde4
font_01_sfnt_off00007c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0F 10456 bytes
SHA-256: bcccdca01e225d7c5fdd44f76c9a05b02a7c2a6fdf8efdd6dd68399ece1aa349

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