Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca25587b7489278d…

MALICIOUS

PDF

44.5 KB Created: 2020-08-12 07:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 23891c6a847c5dd2678cf267f3bbb311 SHA-1: 0fa2804b28fb8e0ae240d2496915501c4b044e5d SHA-256: ca25587b7489278d4951d67c17d15b3140f468d96afdc96e34da3a7aa583f0c4
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to obscure malicious redirectors. The primary malicious URL identified is https://ttraff.ru/wb?keyword=basic%20drum%20beats%20sheet%20music%20pdf, which is flagged as a malicious redirector. This suggests the document's purpose is to trick users into visiting malicious sites under the guise of providing sheet music.

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/wb?keyword=basic%20drum%20beats%20sheet%20music%20pdf In PDF document text
    • http://files.cbmbc.org/uploads/1/3/1/4/131408465/dokesuziz.pdfIn PDF document text
    • http://files.lumianna.fi/uploads/1/3/0/8/130874422/1364949.pdfIn PDF document text
    • http://files.stephartist.com/uploads/1/3/1/3/131379049/7468923.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/1/0432/7243/7910/files/61253489550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4949/1359/files/golumoputetekemikexivif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2878/1988/files/65451724477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/vipapulozidetovake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3661/9431/files/comparative_analysis_essay_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1316/8542/files/sijodirinefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5468/5599/files/nunukevufakib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1690/3062/files/monophasic_and_biphasic_liquid_dosage_forms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/21291727540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/1464/5928/files/81275664110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/19134944565.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
🗂 Part of campaign: lumianna.fi 5 samples

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6662 5552 bytes
SHA-256: 26dcf4fbbe97b1a149187912a91cba92e11af3d3df811b22056ab12ce4a93d03
font_01_sfnt_off00007908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7908 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00008196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8196 10388 bytes
SHA-256: bb49b3824c3a1f39e6024a30071ca81c2d161edae8c9c08b261038bc2f8f3b0a

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