Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bfde666b4c12650…

MALICIOUS

PDF

42.5 KB Created: 2020-08-28 22:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0502bab7737276001ff40011f3a5de90 SHA-1: d9ae2a75b543902c251de9a0d34639ca49804ca8 SHA-256: 6bfde666b4c12650932eb6c18393841fa1e87aa131a68aa3b8b31654519c4d06
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is also present in the document body. This URL is likely used to redirect users to malicious content or phishing pages. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/wix?keyword=i+watch+series+5
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_31301d09ce16491a85013ce73f17303e.pdf
    • https://static.usrfiles.com/ugd/b8c837_047b736365034e24a6aa527cd62a058b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2f482353dc9401d8619a086b667ae32.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/ramaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/3767/1080/files/47679574583.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0766/files/66135091420.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/nalugugijobava.pdf
    • https://cdn.shopify.com/s/files/1/0434/6668/6617/files/narezuputidesazixufuwus.pdf
    • https://cdn.shopify.com/s/files/1/0431/4031/7335/files/49305347375.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5919/files/19527828365.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4499/files/kevisexigovawebelo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/modegetorusuzedorum.pdf
    • https://static.usrfiles.com/ugd/b8c837_fef08631cb184895a3de57d13cc79efe.pdf
    • https://static.usrfiles.com/ugd/b8c837_3382137978224093a2596f2a0e44a9c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_34613afffee84039b3d31d112bd4837f.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf2b371bcc72483caeeb6e56aeef2e0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_233d63fd43384f64a6583dfb153e8502.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069ea.bin
bd540b5df22d33e500f448a909cfe06ec9f45d1bb6df7a43bc87589fbc488193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69EA 5008 bytes
font_01_sfnt_off00007afc.bin
3b6838fa86a85adbe08fd8d65509205c7fa88500122743b420ca2f2c98f26e5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFC 9828 bytes

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