Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37bda85edad98d6…

MALICIOUS

PDF

45.5 KB Created: 2020-08-12 14:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 95d2cf8007bf0cbe5df1e5f4d57fac99 SHA-1: 0d383f00dcd445b70b7201b9de6575129eb3916a SHA-256: f37bda85edad98d65b0c0dd674ae43e637bb6546a82bfb81f478c78f2c7676e0
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This indicates the document is designed to redirect users to potentially harmful websites. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with a significant number hosted on 'cdn.shopify.com'. The document body contains the same malicious URL and a benign-looking title, suggesting a lure to trick users into clicking the link.

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=tratamiento+de+anemia+hemolitica+autoinmune+pdf In PDF document text
    • http://files.gjonesgenealogy.com/uploads/1/3/0/7/130775375/waverewoxuz_xamoziv_favamavil_ruwelu.pdfIn PDF document text
    • http://zagub.bartendingbydennisinc.com/uploads/1/3/1/3/131379510/7754235.pdfIn PDF document text
    • http://viroxizod.ichea.net/uploads/1/3/1/4/131455069/8553932.pdfIn PDF document text
    • http://files.marcodim.com/uploads/1/3/1/4/131452740/8847973.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/1/0432/2079/5556/files/refaxerow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3670/2870/files/edital_do_ultimo_concurso_da_policia_rodoviaria_federal_em.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6459/8434/files/reading_board_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0843/2027/files/voravuxiwuzajutatoxex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5657/9228/files/83767524901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72518400380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/36767843070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/66275391960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/mumikup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/8209899705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2408/0282/files/najosoxuxixisoworagix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6910/7352/files/atletismo_de_pista_y_campo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/aluminium_composite_panel_fixing_details.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/88062474600.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_off00006f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4E 5164 bytes
SHA-256: d29bd0ae8914e05dc17edc09cb0c73814f1a038c8991d57e97b077ed7d8cd523
font_01_sfnt_off000080ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AD 12092 bytes
SHA-256: 81e16f3269cd453d1c133ed93b27c660ccc00cac2a23052f5e9b64377af74e1b