Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b45a9ff0e04048…

MALICIOUS

PDF

39.3 KB Created: 2020-08-14 19:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3bde4a3a0f640687dd27f44e18d46f21 SHA-1: d44ebb8d7491d81ce00aa5dea5292bf5bd702fc7 SHA-256: 09b45a9ff0e0404881a8113d6a9ad04c43353af0ebe9686a00bd74fa0ba626ab
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to redirectors and SEO farms, designed to trick users into downloading software. The document body explicitly mentions 'Primopdf free download for windows 10', aligning with the heuristic findings of a link farm and redirector for a free download lure. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely leveraging JavaScript for execution.

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.com/wb?keyword=primopdf%20free%20download%20for%20windows%2010 In PDF document text
    • http://files.suncoastsoul.com/uploads/1/3/1/3/131379612/baretanemomimu.pdfIn PDF document text
    • http://ketusifi.darwinguevarra.com/uploads/1/3/2/6/132681352/pilenuwikebu_jorup_najitag_tenomux.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/1/0428/9835/8432/files/mefiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4954/7938/files/cambridge_english_skills_real_listening_and_speaking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7986/8309/files/simple_algebra_worksheets_year_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4229/0336/files/java_printf_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1645/2258/files/21614280997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/1314/0643/files/apache_tomcat_tutorial_linux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9745/6801/files/65999555723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9209/8716/files/nordic_track_a_2550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/agriculture_upsc_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8507/9452/files/35065862468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9150/9919/files/blackrock_aladdin.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_off00005bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC3 5472 bytes
SHA-256: c2fdb79f45bf399cd75574997fb4a89b0ca18afa369c8a2589b018a71fe60ca7
font_01_sfnt_off00006e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5B 9956 bytes
SHA-256: 7cf436c929efa5ece28c2b4866d109d56b0b381cdb7b7e6589015b9c2006105c

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