Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db4e39883d9fe83…

MALICIOUS

PDF

41.0 KB Created: 2020-07-31 20:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4cbb44dd1a87fac4f4faf9204f8b0cac SHA-1: a16e0a51c7526c8c68984ecd90698df677eab253 SHA-256: 9db4e39883d9fe83799f6a4afbce8d26b7f3635442cf73178f9c8f82061b03e8
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious content, specifically disguised as a free book download. The primary malicious URL identified is https://ttraff.cc/pify?keyword=ready+player+one+book+pdf+free, which is part of a known redirector infrastructure. The document body, though heavily obfuscated, contains references to this URL and numerous other PDF links hosted on various domains, indicating a coordinated effort to distribute 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.cc/pify?keyword=ready+player+one+book+pdf+free In PDF document text
    • http://files.mcgilltennis.com/uploads/1/3/1/4/131410370/9197234.pdfIn PDF document text
    • http://files.aplincookgardner.net/uploads/1/3/0/9/130969608/9ac8faf519b0.pdfIn PDF document text
    • http://files.redhotyogastudios.com/uploads/1/3/1/6/131636987/29b59ed71.pdfIn PDF document text
    • http://files.4loveofbaskets.com/uploads/1/3/2/6/132683063/0f8d971e5c.pdfIn PDF document text
    • http://files.unismunc.org/uploads/1/3/2/6/132695351/kipadafe_libumaditukox_bixigev_mikumokeb.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/1/0432/2797/1741/files/robafuvebatatawadodoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/nekamipokosokagukup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lasuzopaxikabade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/33125219431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/jibumexibovimexezeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/guvifosizufefixiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5891/2662/files/90725093416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/92690713727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5407/8883/files/56400973787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/nuzar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/sulijopuzikip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/48411044690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2475/0491/files/rugesan.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_off0000603a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603A 5168 bytes
SHA-256: 4282772ebe37f5e0787edc5b59e0f920181839dede9cee5c4cbbe4c142cd1f10
font_01_sfnt_off000071ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71EE 10292 bytes
SHA-256: b97cdbb3cdfa04d1416e703a852ea6307663cf377a19074ab84367c0a2c25ce1

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