Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c35a0931ffe1837…

MALICIOUS

PDF

34.2 KB Created: 2020-08-17 12:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00cc9ff8cc4db11f1e23c97c55794ef5 SHA-1: b1fb8f805c83782244d9ced2990598344160a8dd SHA-256: 5c35a0931ffe183739fb3360d543ea8ac45134cc5b5d0569462e150065bcae15
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract traffic. The primary malicious URL identified is https://ttraff.ru/pify?keyword=elementary+40+dressage+test+sheet, which is likely used to funnel victims to further malicious content.

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=elementary+40+dressage+test+sheet In PDF document text
    • http://files.blissdough.org/uploads/1/3/2/6/132681812/fadunawopiba_fazizopomubor_xavuxorexojuniv.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/1/0431/7832/8221/files/convert_word_to_markdown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5030/2616/files/mabuxebuparodutefuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/saxununedalipasanazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/riwes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5040/0920/files/79991852904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/nutanoromuxifubebabapij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0980/8280/files/12th_class_biology_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7993/3862/files/bexumekugeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0985/8969/files/history_of_islam_in_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6331/1513/files/2560152273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/66008535084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/niwibibuvovarogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/fimevebiruzuterunafe.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 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_off0000485d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x485D 5528 bytes
SHA-256: 8ff45d44f3c6939db30a9c4b12d74fcea339bb71723a08969292a7331f62a492
font_01_sfnt_off00005b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B04 9680 bytes
SHA-256: 251f7462c211bb64d001d59c90f1ecd9ac894cd88b7b8acae3f4e062aec99d6f

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