Malicious PDF — malware analysis report

Static analysis result for SHA-256 7682e6d2c99c621c…

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 02:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2abb35f662317cb9dd045f85cf045bc2 SHA-1: fe3563a0fa5adc8e4e18b30cf6a4d4e4733adb53 SHA-256: 7682e6d2c99c621cd5bd2a0499b18704eec818081d0c20e32886a6a62bd90cc1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.com/wix?keyword=ouvrir+explorateur+windows+10. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing the intent to redirect the user. The ML classifier also 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.com/wix?keyword=ouvrir+explorateur+windows+10
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2981/5711/files/d_d_5e_player_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/81262865647.pdf
    • https://cdn.shopify.com/s/files/1/0463/0387/1138/files/jonekuja.pdf
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/vuxijodufowulu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/wimewojufafodozez.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1767/files/13461217451.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5224/files/32675148104.pdf
    • https://cdn.shopify.com/s/files/1/0432/3396/8287/files/53420539736.pdf
    • https://cdn.shopify.com/s/files/1/0429/6078/1475/files/ima_robot_greenback_boogie.pdf
    • https://cdn.shopify.com/s/files/1/0436/0660/5987/files/junozuwe.pdf
    • https://static.usrfiles.com/ugd/c0b427_6ed0e791d8294acdb8aca1dded6b1f97.pdf
    • https://static.usrfiles.com/ugd/b8c837_423f1dee98b64e0db23e64b60ffe3dff.pdf
    • https://static.usrfiles.com/ugd/b8c837_24841f9d180540919a1375c8fd60701a.pdf
    • https://static.usrfiles.com/ugd/b8c837_86d72fb87252438da66d9ef3052ab444.pdf
    • https://static.usrfiles.com/ugd/80c1db_27632861688446b792dc85f78c283bb6.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_off00005a76.bin
4b817b67828bb0cda1c646ee3aca10cb8b37e3930754cd44e891c2addb5b73ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A76 5392 bytes
font_01_sfnt_off00006cf6.bin
38f84346b16701698d25140e597439c4fd4fe45d859ce555859386648430e0f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF6 12316 bytes

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