Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f5174a878c3ddf…

MALICIOUS

PDF

49.2 KB Created: 2020-08-06 12:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 640d87cd45b99d9f9eb2ab9277f09138 SHA-1: a2de7d29616402e3356d28e25ddf8b723404cf24 SHA-256: c3f5174a878c3ddfa8d44d5c672c6d07b7271d4adbebacec88c2b36f08e1720b
194 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to a known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains text that appears to be a lure related to scientific topics, likely to entice users to click the malicious link. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating a phishing or redirection attempt.

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=bacterial+conjugation+transformation+and+transduction+pdf In PDF document text
    • http://files.sallydavisstudio.com/uploads/1/3/0/7/130776254/xasunido-lidexaxibazapaj-gadegimakepo-banaweluz.pdfIn PDF document text
    • http://files.michaelshusko.com/uploads/1/3/2/6/132681264/def3b7c20b11a.pdfIn PDF document text
    • http://files.waimayyau.com/uploads/1/3/1/4/131437924/bef48ee65ade.pdfIn PDF document text
    • http://files.farstfoundation.com/uploads/1/3/1/8/131856131/poxobulole.pdfIn PDF document text
    • http://files.hitchhouseusa.com/uploads/1/3/0/9/130969265/nuwixudapulezu_numozupolabeb_banubexilo_wiravefodogevu.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/1/0432/7315/8821/files/5538737651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/resufelegijomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7400/2837/files/13105769578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/mokolopexabolirelov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6488/5397/files/20901813083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1907/4722/files/20106772855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0777/7702/files/book_learning_german.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/zuxosabebilexiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7333/9559/files/monujalibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9919/2486/files/rotuxugomubofaxixopewowa.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 8

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_off0000811c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811C 5600 bytes
SHA-256: 815e886c64f3d32f079f0503d256d1ccfc973887b3b832182be776d3608d669e
font_01_sfnt_off00009415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9415 10244 bytes
SHA-256: e344b64700bdabe91e9e78fe0a414978c6dec6b27ad1ddeaa6267bd57ee1a422

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