Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3671696e4a40df…

MALICIOUS

PDF

192.1 KB Created: 2020-08-24 07:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb321ab07a1b85828852e269b946cc56 SHA-1: ffeaa84a258850a0e9128c1f1a30c160db2dbbb4 SHA-256: 7f3671696e4a40dffb03b348eda15add8799261062278d5f91ebb65871f16f2e
134 Risk Score

Malware Insights

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

The PDF contains a link disguised as medical guidelines, which redirects to a known malicious domain. The ML classifier strongly indicates maliciousness. The embedded URL is the primary indicator of a phishing or redirection attack, likely intended to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.cc/pify?keyword=esc+valvular+heart+disease+guidelines+2012 In PDF document text
    • http://tijadep.850plants.com/uploads/1/3/0/7/130739344/gamiteduzalare-nodejezefago-rewuvej.pdfIn PDF document text
    • http://files.paloaltochineseschool.org/uploads/1/3/1/8/131856225/nenonotebu-vukigijatade.pdfIn PDF document text
    • http://files.centralbusinessdistrict.com/uploads/1/3/0/9/130969083/batewazelerawilu.pdfIn PDF document text
    • http://goxorur.elliottkronenfeld.com/uploads/1/3/0/7/130775413/76a0572f32d12.pdfIn PDF document text
    • http://files.wilsonpta.com/uploads/1/3/0/7/130775245/804404.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/1/0439/0433/6040/files/cataracts_surgery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/biomath_paces.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/6886/9019/files/pizonoberalazidagukuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2067/2409/files/sikodozemutibozizod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/44519632586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4849/2438/files/wivuvatajisesunimiza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4452/7528/files/jozatinowagiruxobobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2115/3957/files/linear_approximation_problems_and_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/ecommerce_template_free_w3layouts.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_off00029a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29A6C 5544 bytes
SHA-256: 0c9b3a8f23d9a4af4d428c5e7afe66bba86755eb7e2949b8c434eeb78aa266d9
font_01_sfnt_off0002ad4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD4A 15448 bytes
SHA-256: aa304564f65b7dad35e7b45e8a0e588c39927a73f6207fec363fb2a987d1c55f
font_02_sfnt_off0002dd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD16 16148 bytes
SHA-256: 49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648

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