Malicious PDF — malware analysis report

Static analysis result for SHA-256 209863312fba7b98…

MALICIOUS

PDF

45.4 KB Created: 2020-08-21 11:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f70949a52d91a79995f42ff31aaa4158 SHA-1: ebe73a0581488cb1642b712f097fef20fad3ec2c SHA-256: 209863312fba7b986cbb1250ed75537c39ce44843c5213807139cf832426b917
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=basketball+games+free++for+android'. This URL is designed to lure users with a seemingly innocuous topic. The document also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com, suggesting an attempt to distribute malicious content or engage in SEO abuse. The ML classifier strongly flagged this PDF as malicious.

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=basketball+games+free++for+android In PDF document text
    • http://files.crookeddoorstudio.net/uploads/1/3/1/3/131379591/b5173181.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/1/0433/1533/1227/files/62311821142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3840/7832/files/34204434703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/12658810506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/sulerevipawokul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6372/0613/files/53087996940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/35387018578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/absence_letter_for_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9263/0940/files/cambridge_primary_english_stage_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7750/1095/files/boberofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1297/files/cours_sur_le_cercle_trigonomtrique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8488/1824/files/rivugonomebepasut.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 3

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_off000072d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D1 5480 bytes
SHA-256: 018d6d4ad5ba13082675684bfbd5dc549ba5c54eebfb54eb64f1ab6fb588633a
font_01_sfnt_off00008560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8560 10604 bytes
SHA-256: 0e6e9dd1bb8038353d722a52925f184ad5662b7bfcf8b181600e6aaf12aa73f1

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