Malicious PDF — malware analysis report

Static analysis result for SHA-256 99993cc804d1f717…

MALICIOUS

PDF

80.7 KB Created: 2020-08-14 06:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7db73df3c950c94af0b839d1a9600679 SHA-1: 0cf2aa50baa29c0f0a747f7c85c027ee2e64c7e2 SHA-256: 99993cc804d1f71721c9ff7a5d4fb1ab80b816fdd127d884d0b444366a057e1a
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=gerund+and+participle+phrases+worksheet'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on domains like cdn.shopify.com. The document body, though partially corrupted, contains the target URL, suggesting a social engineering lure disguised as an educational worksheet.

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=gerund+and+participle+phrases+worksheet In PDF document text
    • http://files.recollectiveway.org/uploads/1/3/1/4/131408017/f723b92a39858d2.pdfIn PDF document text
    • http://sovuj.fastflyingmarketing.org/uploads/1/3/0/8/130874277/laxebozisipor.pdfIn PDF document text
    • http://files.dreamcatchers.travel/uploads/1/3/0/8/130814535/kitejigokubinovovok.pdfIn PDF document text
    • http://sokanudax.shopvinocellars.com/uploads/1/3/2/7/132740405/xudad_kekago.pdfIn PDF document text
    • http://files.bevinlin.com/uploads/1/3/1/3/131379183/1d2950ec254875.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/1/0431/8851/9074/files/65737028176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/tanit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4249/5895/files/nagasigejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pufabupenidobuxix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8189/9936/files/aprendizaje_activo_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/5148397784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5930/5877/files/46667337613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/wagaxameluvijaraxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1698/6534/files/bleach_brave_souls_cheats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8898/6787/files/the_lonely_shepherd_guitar.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_off0001003c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003C 5348 bytes
SHA-256: a8205f0fe3a68e276a8197dc0266180f9a2e147db70fbd1c68c29a8599f22cbd
font_01_sfnt_off00011276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11276 10304 bytes
SHA-256: 1d3083fcc7a50ddeda5fc566e656bbde04d1f7ce2921b03321a2e2bd08c194ec

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