Malicious PDF — malware analysis report

Static analysis result for SHA-256 541b1af369e9d639…

MALICIOUS

PDF

42.3 KB Created: 2020-08-23 09:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 205a5f375a11d1b7bbdf3e3bfd8fe7eb SHA-1: 69be23d7611f9ae14e9b0d3e270af35420719058 SHA-256: 541b1af369e9d63949a1cce823f27cc66004769d5357fb4f355b0ef7ded118e7
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'retirement invitation templates' and includes the malicious URL. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The primary malicious URL is ttraff.ru, which redirects to other content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=retirement+invitation+templates+free+printable In PDF document text
    • http://files.cofhhe.org/uploads/1/3/0/8/130814861/2040862.pdfIn PDF document text
    • http://files.immortalsonearth.com/uploads/1/3/0/8/130813120/f8f81e6a1a033.pdfIn PDF document text
    • http://files.bonhamcajon.com/uploads/1/3/1/3/131379295/jikero_xolidoguruxage_gafusit.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/1/0429/2391/7478/files/pupiwugagunosewuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8667/5108/files/calendario_mundial_rusia_2020_horario_chile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2438/2109/files/saxezed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/sleep_hygiene_worksheet_in_spanish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/pixutovolavuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8219/4847/files/agenda_2020_naciones_unidas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/redukenedobitaguwowok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/calculus_and_analytic_geometry_11th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/gikovezutorekem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2366/2236/files/gonikawasupurifaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1163/6381/files/puburizinekalixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/metipaguxezu.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 6

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_off00006834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6834 5252 bytes
SHA-256: f0271621231d6c7f3b1b6aae6f2556323c645b1363e8a70d83f4c53ee7a5b97c
font_01_sfnt_off000079f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79F9 10060 bytes
SHA-256: 130d96500c16ab6500c885d28534f6cf8b70e7c5442ed6e0f17fc2e925002c94

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