Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f159de2212be63…

MALICIOUS

PDF

41.1 KB Created: 2020-08-20 23:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 55f69aa599890ef2e5e37eb848f860ec SHA-1: 9ba49d1cee9518336f07d673d82ee6dee7963274 SHA-256: 84f159de2212be6319064a0bb7544172c81e1a83723b1636340767599602a15f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified as 'ttraff.ru'. The document body, though heavily obfuscated, contains the lure text 'electron configuration practice worksheet pdf' and the malicious URL. The presence of numerous links to external PDFs, many hosted on Shopify, suggests an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly indicates maliciousness.

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/pify?keyword=electron+configuration+practice+worksheet+pdf In PDF document text
    • http://files.debbiemumm.com/uploads/1/3/0/8/130814246/77a4fa.pdfIn PDF document text
    • http://files.rockcreekbaptist.net/uploads/1/3/2/6/132696154/pivulutarex_kizemidibufeve_firabutag.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/1/0433/0687/7080/files/vukanuzedatijaxugevune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/86604224695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5526/6454/files/68534590186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/xujijit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/tumor_angiogenesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/78783928104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7705/0272/files/97907170483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0291/9074/files/call_log_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8296/3349/files/panakixusib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/50660523633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0566/5703/files/gavuvavaxukobibefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85583151980.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 1

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_off000060d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D4 5532 bytes
SHA-256: 4e47240eec9deab06e86017588e6c712fe27a39613a2d659d50a792755ede004
font_01_sfnt_off000073b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B1 10548 bytes
SHA-256: 13bbf0ffdb002439ae6a17f965aa08e1b116aec9f6a99fb0fb2cf3234ffa4ef7

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