Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b748b1f5ebd28a4…

MALICIOUS

PDF

37.9 KB Created: 2020-08-15 08:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 70248ffb1f6ccec641438667dc84b3c7 SHA-1: 09b0d81610d3c7feebae029f743e064e261c0d28 SHA-256: 3b748b1f5ebd28a4d16d2bbfd10ce5524e477c9c81f005ad31d0e549981fca4e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that point to a redirector service, which then leads to a page offering a PDF download. The document body text, though heavily corrupted, contains keywords related to medical guidelines and the redirector URL itself. The primary heuristic indicates the PDF links to known malicious redirector infrastructure, suggesting a phishing or scam attempt.

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=nccn+breast+cancer+guidelines+2012+pdf In PDF document text
    • http://files.allycast.org/uploads/1/3/1/0/131070602/xugokonu.pdfIn PDF document text
    • http://files.beyondthelearningcurve.com/uploads/1/3/0/7/130738836/f867793f7e876b.pdfIn PDF document text
    • http://xuluji.letipcm.com/uploads/1/3/0/8/130814106/maxoviba.pdfIn PDF document text
    • http://files.americanindianbandmusic.com/uploads/1/3/0/7/130775922/49365d.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/1/0439/1328/1688/files/99896643501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/adblock_chrome_browser.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4094/8892/files/60196140293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/error_converting_data_type_varchar_to_numeric.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7242/9980/files/zasili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/astm_b117_standard_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6808/7717/files/xokidokabupudijafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44368867506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8649/4361/files/talafebutak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9450/6661/files/24891020745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2742/9536/files/88818599434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/biographies_of_great_leaders_of_the_world.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/xajejalu.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 5

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_off0000536c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x536C 5756 bytes
SHA-256: ec837ffe6fc0fc400a2095119dd5c3f5ad7502149762c81cde2372105b18658d
font_01_sfnt_off00006710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6710 10420 bytes
SHA-256: d5345d65830b5eb5fd63d49c40805bff4e6b300d2fd8a5dce066c95d950a8b0d

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