Malicious PDF — malware analysis report

Static analysis result for SHA-256 450fa8f0bc12d7f5…

MALICIOUS

PDF

42.2 KB Created: 2020-08-01 04:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f03bbd99e491c96be44cdb59bf250af0 SHA-1: 46f819d2ba402a3d84bc3b785a52dfd2b838818e SHA-256: 450fa8f0bc12d7f5bee3c35fbb69138599d3a2f253b4cf381af283c66d182140
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to lure users to malicious sites. The ML classifier strongly supports the malicious verdict. No scripts were extracted from this sample.

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.ru/pify?keyword=lu+factorization+matlab In PDF document text
    • http://files.mikemythphotography.com/uploads/1/3/2/6/132682790/vozex-vabutijewaweg-xavubonaza-betotemimal.pdfIn PDF document text
    • http://files.woodlandscubscouts.com/uploads/1/3/1/6/131606819/2390789.pdfIn PDF document text
    • http://files.stampoutcancernow.com/uploads/1/3/1/4/131483445/7560114.pdfIn PDF document text
    • http://files.photographsbycarolmccullough.com/uploads/1/3/0/7/130739678/tosorufegujefe-mipozolexufu.pdfIn PDF document text
    • http://files.francescalyn.com/uploads/1/3/1/8/131856392/davexebo.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/1/0433/9938/1146/files/rulizolefesozipemedube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/xexejorofifovogabozil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/nijazinedilador.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8747/6389/files/webizezar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8154/7428/files/dunokaxolumevuwebofeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7074967355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9939/8052/files/53749306936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7747/4206/files/gagunutosowovozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/gelogelorowarawipuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0716/4064/files/38719477801.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6631 4980 bytes
SHA-256: 05ec3c724c745a34bf71dbf736b6be8300116c22f9e586e1cf405d2581d0a7be
font_01_sfnt_off0000771d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x771D 10308 bytes
SHA-256: 0e5da23160a704b8bfa8f9b5d4a24ab2c32d308ee2a9a2c87fa411940ec6b2ae

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