Malicious PDF — malware analysis report

Static analysis result for SHA-256 6315f6f36aa92a96…

MALICIOUS

PDF

40.3 KB Created: 2020-11-02 08:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 08355a94b3e2c6d7091baafc58c6d7d5 SHA-1: e12760dea4b939873a05a10df1716304638d41e8 SHA-256: 6315f6f36aa92a9672b39c22880c6952781216a13b0ea9d2d6f04910f361eac2
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.me/123?keyword=aa+appliance+repair+service In PDF document text
    • https://lotozuxefad.weebly.com/uploads/1/3/4/3/134316708/fofawurosawebezope.pdfIn PDF document text
    • https://wazuwivanesigov.weebly.com/uploads/1/3/4/4/134431766/a7616cd8812def4.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/479d0dc78.pdfIn PDF document text
    • https://zirovosenes.weebly.com/uploads/1/3/4/3/134316706/d0e7e63bcfbd6f.pdfIn PDF document text
    • https://penopetidurip.weebly.com/uploads/1/3/2/8/132815040/karasupav.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/1/0433/1791/9909/files/5.3_turbo_kit_install.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35f79088-5f35-43ff-949a-ca721042192f/vakuxalelinakekis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4764/7894/files/33928275589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f199cb-3d5c-4d17-8c6a-186e71188c81/46210566494.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_off000062d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D1 4976 bytes
SHA-256: 5645552e6789dc951ef6102b2a21f68202a70a11fa6b2a9dbe1a2b7724aa325c
font_01_sfnt_off000073d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D1 9628 bytes
SHA-256: 3af17f3a0b23600a435347a4f800bdba703aee9457b92ccac0e0df8760fa0af4

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