Malicious PDF — malware analysis report

Static analysis result for SHA-256 55b9420edf2bcac5…

MALICIOUS

PDF

45.4 KB Created: 2020-08-19 23:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 56689a8698b76104e8ebaf127f87780e SHA-1: 024f669245fd26098ab782635d422aba25a5c65b SHA-256: 55b9420edf2bcac5a4a18bd1fbbe6c216562adfaa8d57581a44bd2a5037920fd
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Another critical heuristic identified a PDF link farm hosted on Shopify, suggesting an attempt to distribute or mask malicious content. The document body itself is heavily obfuscated and contains the malicious redirector URL, indicating a likely attempt to lure users to malicious infrastructure.

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=bibliograf%25C3%25ADa+de+internet+en+formato+apa In PDF document text
    • http://ninik.vitodorazio.com/uploads/1/3/0/7/130776659/zaladigesasomudaz.pdfIn PDF document text
    • http://files.daniel-craddock.com/uploads/1/3/1/6/131606465/7025495.pdfIn PDF document text
    • http://files.laniganadvisor.com/uploads/1/3/1/4/131455463/mizezeluveri.pdfIn PDF document text
    • http://vuxopad.medtechwearables.com/uploads/1/3/1/3/131379730/7769098.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/1/0437/8948/4189/files/66385582010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1335/6189/files/pokemon_reborn_debug_mode_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/o_level_biology_notes_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/total_addressable_market_calculation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3332/0872/files/satubedanesapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/raxazavik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8984/5667/files/aruba_controller_7005_firmware.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5784/8224/files/form_ssa-_1099-_sm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3014/9270/files/attach_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3341/9162/files/dogugijeges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5597/0454/files/10309193826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6277/9295/files/66827965053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8212/0358/files/47015281072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1856/5270/files/core_ui_html_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/cash_flow_example.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5A 5428 bytes
SHA-256: ac8c625f7d6c0b34ac3bf2bf0bdd2126d8b4d7901663b469b3d6fb03201ce42e
font_01_sfnt_off000080b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B2 11312 bytes
SHA-256: 522bd05afed3956c7c0023125027647a001a6596fc25e336c97997406a3b0ccd