Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b5c58ad9556130…

MALICIOUS

PDF

426.9 KB Created: 2020-07-28 16:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f21628c6adc5559c68c0a12a286c3e96 SHA-1: 879a888965424548830ccdcefeb9641acb4e8e28 SHA-256: 72b5c58ad95561300d5d636f6f94910d8ca49db0597b037202fd1f1eb25864cc
134 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for phishing and malware distribution. The redirector URL is designed to mimic a legitimate download, likely leading to a second-stage payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9831

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=acog+guidelines+for+thyroid+screening+in+pregnancy In PDF document text
    • http://files.genpartsco.com/uploads/1/3/0/7/130739949/kilinapu_fipivu_gupufosetuga.pdfIn PDF document text
    • http://files.jrpnyc.com/uploads/1/3/1/0/131069879/5777197.pdfIn PDF document text
    • http://files.sarahfeinertherapies.com/uploads/1/3/0/7/130775998/danavuwobo-wokitok-legaz-linediwabomade.pdfIn PDF document text
    • http://files.my-h-anonymous.club/uploads/1/3/1/3/131378838/sefulemimivijok.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/1/0431/5214/6587/files/doduperedudejasevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/zeximilelelaveno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5757/7122/files/3292190431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6971/0242/files/71211022538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8688/8601/files/65855022843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5077/0333/files/60189919687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1861/5975/files/4128043288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7646/0448/files/87443284901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0753/1432/files/polizas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/folomikumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57727452667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0887/6956/files/biwetutuzawalefote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00063f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F9E 5392 bytes
SHA-256: 3468ad7dc312f14dbccdacd6a2d440f986a59d844bc32ca3abf6d65ae6c51b57
font_01_sfnt_off000651f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651F1 16972 bytes
SHA-256: 3ab065a31b539a8e096df08e30e5e69e8617d203c3efbf48b9ca165d1eb432ab
font_02_sfnt_off0006862e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6862E 16148 bytes
SHA-256: 1a2b76eb92621148de57a48589384f2ed1ce1add53d2a8f9a0414c0ea737f4f8

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