Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3690a9f7a88af93…

MALICIOUS

PDF

43.6 KB Created: 2020-08-29 03:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 585f9dd1b49d97e6c746b5515d3e59e5 SHA-1: d4922ef3ed2164511eb2fc5d24d4a2ba6ae51ed9 SHA-256: e3690a9f7a88af93b7dcba690c1c75290ab3b435730a1b11bf874400383565c0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a critical heuristic indicating it's a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=honda+install+apk'. The document body, though heavily obfuscated, also contains this URL and references to 'Honda install apk', suggesting a lure to download an application. The presence of a large number of external PDF links, many pointing to Shopify, further supports a link farm strategy to distribute malicious content.

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=honda+install+apk
    • https://static.usrfiles.com/ugd/b8c837_10ef68244060448abd7ba5d1a41ddbec.pdf
    • https://static.usrfiles.com/ugd/b8c837_338bf714bd0e413a9b92497faf5273bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef2bd8778cf849fd9c7f220d72f0503f.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/letelakojewojubafanuberez.pdf
    • https://cdn.shopify.com/s/files/1/0465/3255/9007/files/33940227378.pdf
    • https://cdn.shopify.com/s/files/1/0441/3577/6408/files/85090224481.pdf
    • https://cdn.shopify.com/s/files/1/0439/1141/3912/files/nafixi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0119/files/dish_remote_codes.pdf
    • https://static.usrfiles.com/ugd/b8c837_85fa86e91761456dbce0eb4ed1354b05.pdf
    • https://static.usrfiles.com/ugd/b8c837_e457ef8d9ca54f368d538eec07eb97c9.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/molifabuzebik.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/19008299898.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006075.bin
6444b738de8d4ac0299f0e6c65c624a828890feca67fc722214f24009b453d96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6075 4884 bytes
font_01_sfnt_off00007119.bin
49dddaa543544930169c80d10742cf71a10a90771d945bdf421e53748b1fa594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7119 2140 bytes
font_02_sfnt_off00007af3.bin
9b10042a034e9dca1581a54f71cf53db9680ddec8b3bc5f460bb1e36e43b7ece		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF3 11264 bytes

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