Malicious PDF — malware analysis report

Static analysis result for SHA-256 6baad80f7d70c11e…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 06:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ca7377a91d853b8c90e0487603ee0899 SHA-1: 29ca899fb21ec3119d6fd3ce4705cf0213013968 SHA-256: 6baad80f7d70c11e051fe1c74628a831d02e22cc6b9ea8a384481d84a2a9ecf9
194 Risk Score

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=vb.+net+2005+full+version In PDF document text
    • http://files.mttransit.org/uploads/1/3/1/4/131410736/01632.pdfIn PDF document text
    • http://files.nyddc.com/uploads/1/3/1/3/131384407/pazobinep_kobisebebuv.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/1/0435/1010/4216/files/meshlium_technical_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1052/2268/files/xivuvotutabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/8745/7432/files/az_annual_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8876/4316/files/pod_hd500_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7016/7966/files/26486656304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2117/9816/files/72052586740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/55296424489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0865/4492/files/pharmacy_biochemistry_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6634/1029/files/wixiduwulumefinet.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_off00005db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB3 5148 bytes
SHA-256: fa9bfdb24c01dad12a5f8852898a762bb9089d8514190f232d960051cba0827e
font_01_sfnt_off00006f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5E 10512 bytes
SHA-256: f0396e30db7f0243598a5339f0362461eefb42a45ed7916d6cb6b3bc4c29ad52