Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3482b65ddda9098…

MALICIOUS

PDF

40.9 KB Created: 2020-08-29 13:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99a151981ddd3fb233e4fc0f80121616 SHA-1: 25874b3adacee367ad85496c47079a9a8bb80f1e SHA-256: b3482b65ddda909856388bdcceb69fb14eb1ddb28f848d4dd56fe34471fa679b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a 'PDF_SEO_LINK_FARM'. One of these links, 'https://ttraff.com/wix?keyword=enderal+console+commands', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to lure users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=enderal+console+commands
    • https://static.usrfiles.com/ugd/b8c837_e68aa1eb549b4fbbb7bac419402132c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba6f9c616732463fb313b915f3761ca8.pdf
    • https://static.usrfiles.com/ugd/b8c837_42ea0d87af1e4d1a914af7bc1e3cd140.pdf
    • https://static.usrfiles.com/ugd/b8c837_4044c70bd1634e7f91176e2bca3425b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_a96b52027037426995c4055e1696a306.pdf
    • https://static.usrfiles.com/ugd/b8c837_6573bfaeffc24253bee62bc962877ac2.pdf
    • https://static.usrfiles.com/ugd/8de238_cbfbca9936794a98b487af454d5eab31.pdf
    • https://static.usrfiles.com/ugd/66c878_5bc2adbf8a7643cba639412d1fab12bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d21d8e49165415cbea1705a388e3f00.pdf
    • https://static.usrfiles.com/ugd/b8c837_20ffe5153bf840dda99856ec899bec2e.pdf
    • https://cdn.shopify.com/s/files/1/0434/2572/6625/files/rows_and_columns_in_excel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0450/7946/2040/files/astm_a572_15.pdf
    • https://cdn.shopify.com/s/files/1/0463/7599/3505/files/canadian_citizenship_practice_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/9000/1572/files/fokabafobafezigajilexigud.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006354.bin
140277f88968139db235ff980763f37e2b4ba169e2244376edca34a1a4d13f25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6354 5040 bytes
font_01_sfnt_off00007454.bin
7217fff51e1b61269e363da6d07f9739183becf9345d131e67fdd892b501bd2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7454 10160 bytes

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