Malicious PDF — malware analysis report

Static analysis result for SHA-256 e24467cfea0659b4…

MALICIOUS

PDF

42.0 KB Created: 2020-08-14 20:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d89ac7dd1864f23cf0ca661d3bf2ffa SHA-1: 6248e018fe4db8ef57e91458b68ed9d34bb08234 SHA-256: e24467cfea0659b4bfdce11784b23bff30605a89cf2030e264294a76b358803d
202 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as an 'upsee exam form 2020'. The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm for SEO poisoning or traffic generation. The presence of a visual download button further supports a lure-based attack. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=upsee+exam+form+2020 In PDF document text
    • http://files.dsppsu.com/uploads/1/3/1/8/131872238/6978050.pdfIn PDF document text
    • http://sojafev.cos-medics.com/uploads/1/3/0/8/130813115/931418.pdfIn PDF document text
    • http://files.euroconferences.org/uploads/1/3/1/3/131380773/fupuxomejo.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/1/0429/3391/1705/files/28693431706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9921/0407/files/lozizifosawemafom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9054/2741/files/720p_vs_1080i.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5247/3252/files/97219988312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5056/3734/files/60954874400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/allergic_rhinitis_treatment_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/93476882325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/52836601929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1727/9400/files/jovigerejapenubozejoda.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_off00006568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6568 5348 bytes
SHA-256: 8bdb53690ca7380c578e1819c198263f192d3a65eef9d717ed59bbd8556d59cc
font_01_sfnt_off00007786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7786 10540 bytes
SHA-256: a4e716a909c0bcbab972f9e66d5d42f67a3d5d3b9458e232c379ac6cbca6a49e

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