Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a5b99b0d1ab67fb…

MALICIOUS

PDF

56.0 KB Created: 2020-08-18 17:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9b1fd43e73526d49e8970bb3a00dc223 SHA-1: d9ca17398dc95353dc10aa689e0df6765e0de9d7 SHA-256: 5a5b99b0d1ab67fb7c4aa323eb4bf991eaa7e30cbd59e50669f08d570f817438
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically designed to lead users to a link farm. The document body, though heavily obfuscated, contains a URL that matches the redirector identified by heuristics. This suggests the primary purpose is to drive traffic to malicious or SEO-spam 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=5e+fighter+character+sheet In PDF document text
    • http://files.princetonfamilywellness.com/uploads/1/3/2/7/132740362/zixokifafiwivojij.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/1/0435/4323/2661/files/xusebonawigosefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3829/2638/files/zirisagipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/9695068876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/godzilla_game_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6060/6616/files/clp_outages_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/teddy_bear_picnic_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/agar._io_hack_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5068/6874/files/birthday_paradox_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/dps_warrior_bis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/96067816862.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 2

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_off00009e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8F 5140 bytes
SHA-256: 26562407b4fd3a345d6c5bb6faf4cd736cde217f0734c07b358688ca8fd24f11
font_01_sfnt_off0000b006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB006 10372 bytes
SHA-256: 92193387a2ceaab58303267904c34da188f95395833bed866b3e0a25673f21e4

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