Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d405ddcb3b5e84c…

MALICIOUS

PDF

56.3 KB Created: 2020-08-13 11:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b7bfb9a4d256b883d374689da3ea89e SHA-1: 7c2099221e5e306ba03e6a2b07f12ebebfd349a1 SHA-256: 4d405ddcb3b5e84cb2be6a49da4507cd2517e37581126fba1312ac5b4675d4d8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wb?keyword=nuance%20power%20pdf%20standard%20advanced%20vergleich'. This indicates the document's primary purpose is to lure the user to a malicious site. The presence of numerous other links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility of the malicious redirector. No scripts were extracted, but the embedded URLs are sufficient to determine the malicious intent.

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=nuance%20power%20pdf%20standard%20advanced%20vergleich In PDF document text
    • http://files.floridaflightsolutions.com/uploads/1/3/1/3/131381480/mogabopujomirewafu.pdfIn PDF document text
    • http://files.dcsuniversal.com/uploads/1/3/1/4/131408131/e7e019dc6f8d6.pdfIn PDF document text
    • http://tabetixa.gsm-eu.com/uploads/1/3/0/8/130874359/pegoradogud.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/1/0429/3532/0735/files/99761029412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1977/1799/files/fedevan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1251/4204/files/ufc_208_live_stream_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3767/0041/files/67829634834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5396/4702/files/westworld_pilot_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/chemistry_textbook_class_12_gseb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/barron_s_us_history_regents_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/crossword_puzzles_for_middle_schoolers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/15973096353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1481/5901/files/62289391762.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
🗂 Part of campaign: floridaflightsolutions.com 3 samples

Related samples 2

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_off00009933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9933 5540 bytes
SHA-256: 0f245d050e60d665770cecdde1cc4ea37afcecd6c11a4d0c81cc7fcbc97a3c4d
font_01_sfnt_off0000ac16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC16 11992 bytes
SHA-256: 8cf0a4eb485c543ec17371bec5f360d0aa21a1f999062b73effb72923ea71196

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