Malicious PDF — malware analysis report

Static analysis result for SHA-256 993c11bcc746380a…

MALICIOUS

PDF

51.1 KB Created: 2020-08-09 07:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6541b288b89902835fae80290a14cfdf SHA-1: 2d099e763368afb2f8a86d1e84a75b7480c4a08d SHA-256: 993c11bcc746380a34c50cd36284fad455cd4cc40fe9fba0a0e1fc256fcce86a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the target URL, suggesting a lure to download or view content related to 'agriculture notes in tamil pdf'. The presence of a link farm further supports the malicious intent of redirecting users.

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/pify?keyword=agriculture+notes+in+tamil+pdf In PDF document text
    • http://files.nikkileahdesigns.com/uploads/1/3/0/8/130814588/a05a6f.pdfIn PDF document text
    • http://files.salpiconontario.com/uploads/1/3/2/7/132740670/6866887.pdfIn PDF document text
    • http://files.dakshithawick.com/uploads/1/3/1/8/131857527/jokesavomupi.pdfIn PDF document text
    • http://bogewi.acdcak420.com/uploads/1/3/1/4/131437615/6108812.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/1/0435/5971/4971/files/automatic_machine_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7117/5846/files/gifuwotuvewonida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9008/7829/files/jumafupatifof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6803/0102/files/jadawanibikunupapotope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2648/0290/files/23477291887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/96074457950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6073/9752/files/66577498920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/autocad_3d_export_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3183/0421/files/bujipekerijogovuduwazesow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/tipos_de_intermediarios_en_un_canal_de_distribucion.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_off000087e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E5 5464 bytes
SHA-256: aaac652090960722427389c8e48190ad1b8c85e0f035b0234d9d641d7ada8a6c
font_01_sfnt_off00009a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6C 10460 bytes
SHA-256: 630e51021bd217f34bed12fecfdd77889ac55692a1de5385782c6e534bacde2d

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