Malicious PDF — malware analysis report

Static analysis result for SHA-256 6603d3ae942adc97…

MALICIOUS

PDF

41.2 KB Created: 2020-08-13 00:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1274ed0f798f44b92f892a33e5fe6c4d SHA-1: a1183cdee1a0afc6f2cff48b660f7ca8679f0a89 SHA-256: 6603d3ae942adc9771cedbbce7962e0c1c2225ffafac79b6a52a61219a2ac36c
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing attempt. The presence of a malicious redirector URL and the ML classifier's high confidence indicate malicious intent. The document body, though obfuscated, contains the malicious URL, reinforcing the lure.

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.cc/wb?keyword=robert%20eggers%20the%20lighthouse%20script%20pdf In PDF document text
    • http://files.brightdressage.com/uploads/1/3/1/1/131163878/9313462.pdfIn PDF document text
    • http://files.extremeimprov.co.uk/uploads/1/3/0/7/130775084/porakukupu-dibubo.pdfIn PDF document text
    • http://files.ucsdstrive.com/uploads/1/3/0/7/130775145/ralus_xewumas_rilupi_kurikete.pdfIn PDF document text
    • http://files.keyahealth.com/uploads/1/3/2/7/132741476/5002980.pdfIn PDF document text
    • http://files.drawingonmusic.com/uploads/1/3/1/0/131070044/mupesibudunug-womexezaluzo.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/1/0430/1737/1797/files/tigepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7166/3256/files/abacus_worksheets_for_grade_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3775/3501/files/67559809895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3600/6817/files/36295687065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0625/4504/files/verutemimonuraraguwawuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/98638800536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2458/7674/files/lixijoxesawot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/33841680426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/47947622090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/47838818964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1305/3338/files/development_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3503/2737/files/96226328203.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_off00006313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6313 5356 bytes
SHA-256: 407af4aa66382500e40c6c4b91e7325f5fd4cad9181d0bc4bc5961ca60beea78
font_01_sfnt_off00007543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7543 10060 bytes
SHA-256: 3b0a669ea8996153cf4aabdaa3d60e12393e31d87538b82583d5354baa35702c

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