Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b51e0ddeea39a0…

MALICIOUS

PDF

195.2 KB Created: 2020-08-21 09:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5f500b0ed9700e18015dbd2096e14b6e SHA-1: 7b0e5f9f9b82ca9b096563b727f737c390b9dc04 SHA-256: 13b51e0ddeea39a0477fb4b0ad96fa69f0df5e4c980cbde2bd52694cb1585ae1
142 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains text related to medical guidelines and the URL itself suggests a lure for downloading a document. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's a redirector link used for phishing or malware delivery.

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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=staph+aureus+bacteremia+guidelines+idsa In PDF document text
    • http://vogodu.lovedorsetwoodland.com/uploads/1/3/1/4/131455158/rotuji.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/1/0437/9541/5189/files/makinawugenikesowomonis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/kusikogojaxatopegefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/surah_yasin_malaysia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6173/1743/files/balbuena_grandeza_mexicana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/61245984919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/10106474364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/36724396325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0363/3051/files/fubonakake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/43953255520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/vezofegogalavegiged.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/28815912417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/19832401809.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_off0002a4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4A1 5728 bytes
SHA-256: d2bf4c01440e1d220b33c04a73484fcc1ec72a46a105304af7bd90a9b28a8d0c
font_01_sfnt_off0002b7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B7E3 15368 bytes
SHA-256: b216cda6dcd2150db2c7739871042e4899797d3939a07e26762b3f96f012aee9
font_02_sfnt_off0002e8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E8E4 16148 bytes
SHA-256: 43dd7310e986e37c0562d6efd2a67b6291a0d41fa892ecd43b306c3e7231f7b7

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