Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b583253d25018bd…

MALICIOUS

PDF

231.5 KB Created: 2020-07-25 10:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a42458a1ff9e3bfae757da352624a555 SHA-1: 0eda554fec22cc21499d38b3713e9950fa3d96c9 SHA-256: 5b583253d25018bd0a9bf2d9f2703fa48bedca9c3c85a44f582b2cc84d33f7ff
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a link to a known malicious redirector, ttraff.com, which is flagged by multiple heuristics. The document body, though heavily obfuscated, suggests a lure related to medical guidelines. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent, likely to redirect the user to a phishing page or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

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=carotid+endarterectomy+guidelines+2017 In PDF document text
    • http://files.living-media.org/uploads/1/3/2/3/132302941/2869425.pdfIn PDF document text
    • http://files.saralynnquigley.com/uploads/1/3/1/4/131454190/9082248.pdfIn PDF document text
    • http://files.bustihistoricalsociety.com/uploads/1/3/1/4/131453421/nubugo.pdfIn PDF document text
    • http://files.stjohnash.org/uploads/1/3/0/8/130814408/wawotesedasorodokip.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/1/0428/7833/7187/files/zuwudimafuzev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6914/4230/files/lirabebaximal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifivejeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/vagolovalofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/29813010488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9599/0175/files/12416498216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/kalunid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/xenujapejazubave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/rovafukilujekako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/sopiraruvolirijebujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5606/2876/files/xezitovusezirovamol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9892/3427/files/buxamibajikewaxozemuzejif.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_off000335a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x335A4 5672 bytes
SHA-256: b7da945e882add8d11fbab54fa7e3092436e8b673b28cdfcb796a438cab1886e
font_01_sfnt_off000348f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x348F3 15456 bytes
SHA-256: 4a8ebc06377b408eb74f848ae2868544b0281ebeecef30e7befac0ea11cac941
font_02_sfnt_off00037999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37999 16148 bytes
SHA-256: aabbb95e4258a1bccfe6759090a0a8b97a33e8154131110566ffb2eaa8fdb080

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