Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d75b4dcb28ec5d…

MALICIOUS

PDF

40.6 KB Created: 2020-08-09 05:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9df99bb8fb3102a49fd3413c2bb63b58 SHA-1: 0f67441ad000d5662467e7c6b4c30182ff5bc4a0 SHA-256: d3d75b4dcb28ec5da1b285c45ca7be6a94f33f1ae9d365d15823fbd4d423242b
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as educational material, aiming to lure users to a harmful website. The document body, though partially corrupted, includes the primary malicious URL and numerous other URLs pointing to PDF files, suggesting a link farm or content-loading mechanism. The ML classifier strongly supports the malicious verdict.

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.cc/wb?keyword=fill%20in%20the%20missing%20number%20multiplication%20worksheets In PDF document text
    • http://files.davidkaplinsky.com/uploads/1/3/1/1/131164295/c4ee7caa10872c.pdfIn PDF document text
    • http://files.kirklandadventuregscamp.com/uploads/1/3/1/4/131437671/jimiz.pdfIn PDF document text
    • http://files.sunglassfilms.com/uploads/1/3/1/8/131857494/likid-fuzulomazuzo.pdfIn PDF document text
    • http://files.withthesehandsmj.com/uploads/1/3/1/4/131438509/matavokefubena.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/1/0427/4552/8487/files/adobe_photoshop_cs5_learning_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulifagavukaxubodipiripu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8424/3363/files/wausau_weather_radar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/wisidonopabugeboramela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4854/2109/files/pezem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/impeachment_process_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9164/6880/files/100_years_five_for_fighting_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/30602265800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/48996501455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/metal_gear_solid_rom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4337/2703/files/php_get_class_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2583/3882/files/sefalatek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6977/4750/files/86549924137.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 7

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_off00005fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC8 5600 bytes
SHA-256: e5c48f3be9cfacf56a87ea9c1a50d83d77e83dd6d3f1f187f4c745d1bcaab877
font_01_sfnt_off000072b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B7 9884 bytes
SHA-256: c6f905779b91374df3cf3839f58de0943269a8ad5ff17441da5989bb47ea7a1d

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