Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1bd5a6deec4de0…

MALICIOUS

PDF

43.1 KB Created: 2020-08-19 20:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c5471101bc9d760a08a9eb08d5bd1c4 SHA-1: b4cc6358574fa6e3a942ff37fb2f4f0d688c29a2 SHA-256: af1bd5a6deec4de04b0792836a2954fbf017dbee82a58073c742d9da9c78503b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=candy+crush+game++apk, suggesting a lure related to a game download. The PDF also contains a PDF_SEO_LINK_FARM heuristic, with numerous links to Shopify-hosted PDFs, likely for SEO manipulation to improve search engine ranking for malicious content.

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.com/pify?keyword=candy+crush+game++apk In PDF document text
    • http://files.physio4athletes.com/uploads/1/3/1/3/131380558/b4626.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/1/0439/1724/6632/files/96797586695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/97196290938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9471/1203/files/1830353686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/lupolujanoregosojesorek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0631/1070/files/makirafoselewed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/kizovipedawik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5592/2856/files/99379885566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2838/8767/files/29209903232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0873/6927/files/90778619328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1126/5944/files/zimozifewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0522/0776/files/40762320347.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_off000068e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E4 5528 bytes
SHA-256: cec886f94fde68a159e9f74214c27679b2c8d148b7bcd9538bbc91dfad1308bd
font_01_sfnt_off00007b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8B 10684 bytes
SHA-256: b27f1705e6eec70197c911538c2f89fbecc9ee105a3174dd258bc7d5160ca7da

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