Malicious PDF — malware analysis report

Static analysis result for SHA-256 c99fbfe542a9bf55…

MALICIOUS

PDF

39.2 KB Created: 2020-08-14 21:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4669361d93afcf925b1001be57b86e30 SHA-1: 9832dd0298b2c2f11e4435c0b69af3fa23059b84 SHA-256: c99fbfe542a9bf55b81185627c43c0488ad8087de4898630105ce5214fe489f0
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, embedding numerous external links. One of these links, 'https://ttraff.ru/wb?keyword=sono%20solo%20canzonette%20testo%20pdf', is flagged as a malicious redirector. The presence of many links, including those hosted on Shopify, suggests an attempt to distribute malicious content or conduct phishing operations by overwhelming the user with choices and hiding the true malicious destination among seemingly benign ones.

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/wb?keyword=sono%20solo%20canzonette%20testo%20pdf In PDF document text
    • http://foguludus.stpaulsgpk.org/uploads/1/3/1/0/131070450/viluvut.pdfIn PDF document text
    • http://files.beadart-austria.com/uploads/1/3/1/1/131164081/solax-jeruvipaze-vifuwaxa-zifinaxuso.pdfIn PDF document text
    • http://files.ernestob4arusd.com/uploads/1/3/0/8/130874210/rumojab.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/1/0435/5339/0743/files/dvt_in_pregnancy_rcog_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9472/7069/files/birumukud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2214/0070/files/wupemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/present_perfect_tense_vs_past_simple_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7932/6103/files/pupuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3824/5017/files/27086817559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3519/6578/files/1965_dodge_truck.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5842/9078/files/wizard101_tartarus_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4940/2024/files/alter_ego_2_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/soldier_s_manual_of_common_tasks.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_off00005abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABD 5208 bytes
SHA-256: e741f3ef9a635a32c097c2c9b7bd2d1ad6983665759107c1e13820090790850b
font_01_sfnt_off00006c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C88 10936 bytes
SHA-256: 033c8a9fac5d07f34ee5f7aeff18955d04351231dbfffb4f336ad991999980c2

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