Malicious PDF — malware analysis report

Static analysis result for SHA-256 f497c185c3d95fd3…

MALICIOUS

PDF

39.5 KB Created: 2020-08-11 23:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 795bf6052f244a3b8b1fe8107200af10 SHA-1: 59082a132b43aa6a8ce6e551dffbc5f6cc258819 SHA-256: f497c185c3d95fd316568052dd5ef921d0dc83b6c972b24d5ca82bbcb49313d8
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, https://ttraff.ru/pify?keyword=cambridge+a+level+economics+notes+pdf, is designed to appear as a search result for educational notes, likely to trick users into clicking it. The file itself is generated by wkhtmltopdf, suggesting it was programmatically created to host these links.

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=cambridge+a+level+economics+notes+pdf In PDF document text
    • http://files.misswaynecounty.org/uploads/1/3/2/6/132681851/1267092.pdfIn PDF document text
    • http://files.abfabescapes.com/uploads/1/3/1/3/131397987/9eb18a6e.pdfIn PDF document text
    • http://files.nlccpsw.org/uploads/1/3/1/4/131406841/fidijup.pdfIn PDF document text
    • http://files.stratuscorpfinancial.ca/uploads/1/3/0/9/130969004/2899676.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/1/0434/7330/5762/files/bulev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2225/3208/files/psychology_12th_edition_myers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8412/0225/files/46220968200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/7831401023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/random_drawing_idea_generator_3._0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/79842573802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7179/8424/files/dezuluf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/3499607870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/budapest_metro_map_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/67048532468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3491/8558/files/kivufetudanos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/89213637822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1566/5824/files/zopoxulexozadufikeratajo.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_off0000583f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x583F 5580 bytes
SHA-256: 913d0f477e92587d3d2f317947595d3bcaf2fdc451482327ec1026d95b96b6ce
font_01_sfnt_off00006b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B25 11652 bytes
SHA-256: a145d0cc72bcd48a12c34d9f129ae30e38707aef84b00802e2e44fd93dc2bc89