Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b72dcd698d05156…

MALICIOUS

PDF

41.0 KB Created: 2020-09-11 02:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aaf3131d43d5422cb1a4804307c2af2f SHA-1: 6c43689f91fdfab994a49751b2f0955d9d4c61bb SHA-256: 1b72dcd698d05156bc17020fdf17d64b5d91fd0a31ee88638c0bac17f740eb66
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL disguised as a voucher card template. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs, suggesting a phishing or redirection attempt to a malicious site.

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.link/wix?keyword=voucher+card+template+free In PDF document text
    • http://files.redeagleranch.com/uploads/1/3/1/4/131482954/2737580.pdfIn PDF document text
    • http://xekirin.alexandraroth.net/uploads/1/3/1/0/131070705/3756106.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/35c6e2_48b65000a33548b5ac9ae94cd2388fdd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/81ef4b_bf5ccb3dde3941ee952f1c974791d2d3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d1d005_bcd3004168794b2f94dc819098e0cae0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a31856_1fded58501474ea28cbdd32afbe979a7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/451461_dc1429c209a54588b09b0558cea11daf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c5d40f_c508da812a1d44a8922daf0da44e5eb3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cd1d52_9ea1d2c45dcf435285afe2cc285b0fbd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/3985474252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6486/0312/files/78612850394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7822/1973/files/sudalewegumuzipemobada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0777/8711/files/mutanaxusonevulo.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_off0000632c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 5180 bytes
SHA-256: 70f92ca73b9efb2db7a458689d97339a7d7a60fa6a6f026976588217733a8890
font_01_sfnt_off000074a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A9 10216 bytes
SHA-256: b93e874a57a5f6d89ce3ad5f96c251abd5e98198e7b90c5bacd422a76b29f829

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