Malicious PDF — malware analysis report

Static analysis result for SHA-256 846a917e4b70b3bc…

MALICIOUS

PDF

43.2 KB Created: 2020-08-07 16:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e84db54dd763622619d604a17e66815e SHA-1: 1f234a837ccfd18fb19dc4eed2fc9bf36bbcc3e4 SHA-256: 846a917e4b70b3bc40238e5205b1fd1c480a7fe6c382c7a2d2737e2307d8f9e7
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at https://ttraff.com/pify?keyword=important+vocabulary+for+ielts+speaking+pdf. The document body, though partially corrupted, contains text suggesting a lure related to IELTS vocabulary, and the presence of numerous external PDF links further indicates an attempt to drive traffic to potentially malicious sites. The ML classifier strongly supports the malicious verdict.

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=important+vocabulary+for+ielts+speaking+pdf In PDF document text
    • http://pewiwekit.vailhalla.com/uploads/1/3/0/7/130775734/2868690.pdfIn PDF document text
    • http://files.bratrudgolfcars.com/uploads/1/3/1/4/131407692/bufatuwi.pdfIn PDF document text
    • http://files.mbabechuk.com/uploads/1/3/1/3/131384468/worepobegisalo.pdfIn PDF document text
    • http://files.ugadeltaphilambda.org/uploads/1/3/1/4/131453588/917878.pdfIn PDF document text
    • http://warenejes.andrewtozerfineart.com/uploads/1/3/1/6/131637309/4289195.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/1/0430/9277/0977/files/45477518865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4681/3346/files/franklin_covey_planner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5837/1496/files/galofosulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8963/9077/files/22272663943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1185/0918/files/pazemufopusizanixoxepedew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8330/8962/files/lesulojosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/mexerosowow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/jekurisusog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9648/8613/files/58526170469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7017/6932/files/epsilon_not_value.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0501/6225/files/43588615336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/56925613193.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 5

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_off00006924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6924 5780 bytes
SHA-256: 6c448b37899a9302a61b8bc2fb8c3c82af99f0d2926b2736d26eab5606b5072d
font_01_sfnt_off00007cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC6 10256 bytes
SHA-256: 1e714974d58502ab474f55d785b7b67e05ea0a9c3dffb56136e01c32166587fe

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