Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d4cef752e851e8…

MALICIOUS

PDF

40.2 KB Created: 2020-08-05 00:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f25e37ae81b47cbd10c20a4ecd91da6 SHA-1: 58063be881af61ded6c2eaed80291bf3e9d72edd SHA-256: 73d4cef752e851e8ec31b715b9f630c5fd0d35cd56f19397afbda521c872a847
194 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector for phishing or malware distribution. The document body, though partially corrupted, suggests a lure related to a 'medical fitness certificate for leave pdf'. The presence of numerous SEO-optimized links further indicates an attempt to broaden the reach of this malicious campaign. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document leading to a malicious URL.

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.com/pify?keyword=medical+fitness+certificate+for+leave+pdf In PDF document text
    • http://files.momentum-emporium.com/uploads/1/3/0/7/130776812/84f59e871db7.pdfIn PDF document text
    • http://files.sterlingenterprisesllc.com/uploads/1/3/0/8/130874469/9545961.pdfIn PDF document text
    • http://files.dollslakesidebb.com/uploads/1/3/2/6/132681356/4774822.pdfIn PDF document text
    • http://files.allforkidscenter.com/uploads/1/3/1/8/131871467/kavetisex.pdfIn PDF document text
    • http://files.applestar.org/uploads/1/3/1/4/131455543/rudufezikup.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/1/0437/2440/6938/files/67335141896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/xabikevolefaxujaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/74146825521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3476/2654/files/veer_bala_rastogi_genetics_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/48784707173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/dokaval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/77058191259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/49761150121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5497/3606/files/nafamuvojujolukulek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2446/3525/files/kozix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/98281755045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/guxujud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/15138334831.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 8

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_off00005f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F89 5212 bytes
SHA-256: 3fdbb1a75e7888dfbd6f8416227dd49d679d8fe80a148dbf3a9a392efc66f52e
font_01_sfnt_off0000716e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716E 10012 bytes
SHA-256: 087fbe0644d7f2a74cb5f291367bd04b39fbb3d794265a2f4a256c8705ca8807

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