Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db74ed7a3cdd6eb…

MALICIOUS

PDF

51.5 KB Created: 2020-08-26 06:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c8681d3a600eb9990af2d0b99172af8 SHA-1: f6d8b94ff73a950ba3f811ce7b1e298ca3e476d3 SHA-256: 8db74ed7a3cdd6ebf0924de34ffd5d35bcd5f965fbb5df870639499561b04cf7
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the text 'Why is netflix freezing' and the malicious URL, suggesting a lure to a phishing or scam site. The presence of a large number of embedded links, many pointing to Shopify, indicates a link farm strategy, likely to obscure the malicious redirector.

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/pify?keyword=why+is+netflix+freezing In PDF document text
    • http://files.kilkennyarchclub.com/uploads/1/3/0/7/130776492/9820818.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/1/0432/3078/9800/files/fundamentos_psicologicos_da_educao.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/58445142281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5591/4908/files/69939237087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1513/3605/files/43985714580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/67304763663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0617/3081/files/dicionrio_da_academia_brasileira_de_letras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/xuganesakuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7437/9173/files/autosuggestion_und_heilung.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EA 5052 bytes
SHA-256: 2669ea6cb9fbfa00a16b90bc4daee599798adce88602797bd3d2e74ee86abb69
font_01_sfnt_off00008531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8531 11132 bytes
SHA-256: 996ff28e58c6a4253151499ddbd5f3c88260e4bf8980952468bb1d62942be959
font_02_sfnt_off0000ab02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB02 16508 bytes
SHA-256: 76c58d9dad2553210f58dd276edfbe5dbdf64153339314c97a5850829df6aff1

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