Malicious PDF — malware analysis report

Static analysis result for SHA-256 77cec54d626e000c…

MALICIOUS

PDF

44.9 KB Created: 2020-08-12 15:35:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5b0d8a1f98239d9ce76ad0b91ea4f777 SHA-1: 3f0d84a3f701e714bb82cdf4aee89da36c96de5e SHA-256: 77cec54d626e000caf4ede2f56500e7c6222da5b85314e57700a2ee054e6243f
194 Risk Score

Malware Insights

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

The PDF contains numerous links to redirector domains, including 'ttraff.cc', which are designed to obscure the final malicious destination. The document body, though partially corrupted, contains text related to 'Urticaria idiopatica crônica pdf' and embedded URLs, suggesting a lure to trick users into clicking malicious links. The presence of a link farm and redirector URLs indicates an attempt to distribute malware or conduct phishing.

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=urticaria+idiop%25C3%25A1tica+cr%25C3%25B3nica+pdf In PDF document text
    • http://fivesal.t300.org/uploads/1/3/0/8/130874493/5065415.pdfIn PDF document text
    • http://files.stmaryslee.org/uploads/1/3/1/4/131437669/9090346.pdfIn PDF document text
    • http://mufiv.stochasticcitizenship.org/uploads/1/3/1/4/131406390/8611730.pdfIn PDF document text
    • http://dabisuba.rolfharrisisinnocent.com/uploads/1/3/1/6/131606758/ruzubepunudoper.pdfIn PDF document text
    • http://files.canvasofthemind.org/uploads/1/3/0/9/130969758/1550142.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/1/0440/6712/7446/files/jeminigotitadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/perceptual_maladaptation_mcat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8771/5742/files/young_wild_and_free_downloads.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/4468389371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/5836/7386/files/fobekurometunosib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6299/2801/files/junemaxuluvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/81084385398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/php_html_template_class_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9820/9446/files/effect_of_water_pollution_on_agriculture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0741/8263/files/tumenoxesenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5590/6967/files/mojagisijuzi.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 3

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_off00007142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7142 5300 bytes
SHA-256: 17ca7d6707772d6f45d3948bb978212226968b4f8911c1b172675e20e11c1acc
font_01_sfnt_off0000827f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827F 10528 bytes
SHA-256: 00e163b6f2b9a9cd4c11d27b10570ef266e48842dcda3cfae82aea21a2b1f258

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