Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f3f0d01034c943…

MALICIOUS

PDF

55.8 KB Created: 2020-10-31 20:46:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 99209b41d9bce4b82e6522137bd0d3c5 SHA-1: c2bdf254c12e84679f5dbf0bc08716764ad5b5dd SHA-256: 02f3f0d01034c9431dea7108c0de2e8a3d07cc1918264ace0fd0bf9421acd69e
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=tera+guide+github In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f87d70543201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408352/normal_5f9293449275e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388416/normal_5f8ebbec8ae53.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/37652f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375093/normal_5f9b5d33721cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379371/normal_5f905e1f4e805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381534/normal_5f8e2ee7d0db7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406228/normal_5f91b840ef7b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406454/normal_5f98d690980bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f9313401b0b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_5f94f5d4ae3cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384468/normal_5f95bb955b4a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f98d101e7d7c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6633 4632 bytes
SHA-256: cf3ffdaf399b7689373061972c710e6e6e1a5a68e221b6040989e8535fef9cdc
font_01_sfnt_off000075ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75FF 19112 bytes
SHA-256: f32ca0aee2b8daf7d0ebc5102181b4c9f17472d50dd3e76a2eef710d4cc80458
font_02_sfnt_off0000aed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAED3 16164 bytes
SHA-256: 296c99dc130b3e9dec9c0ff2743aaacb71c13c9fc424d08251ed5e907fa2c3b3
font_03_sfnt_off0000c3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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