Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a1af658febeee7…

MALICIOUS

PDF

48.3 KB Created: 2020-09-07 01:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c3e5670e9ae0ec598a186cfbf093893 SHA-1: 9db535568c12dbca47e702d1a83f92528610d8a7 SHA-256: 85a1af658febeee7bdbf2364dc2c6f55a2ee56bf6fa5eb6af10164be8cb971e6
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/pify?keyword=vidmate+play+store+free'. The document body also contains this URL, suggesting it's the primary lure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to static.usrfiles.com. The overall purpose appears to be directing users to potentially malicious content under the guise of software downloads.

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.me/pify?keyword=vidmate+play+store+free
    • https://static.usrfiles.com/ugd/5360f8_0125e5bb4aa84034a8efd5d53b0ec39e.pdf
    • https://static.usrfiles.com/ugd/bf650e_b4de0168b3e54f7aac3f711c6cb42844.pdf
    • https://static.usrfiles.com/ugd/1f5cef_3ec41f5074884a00a652c23deb46e648.pdf
    • https://static.usrfiles.com/ugd/724bd4_5ffd3978582b4a6dbf46fd53953a97fb.pdf
    • https://cdn.shopify.com/s/files/1/0439/3720/2344/files/call_of_duty_mobile_mod_apk_blackmod.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/lavokasajagegubofar.pdf
    • https://cdn.shopify.com/s/files/1/0433/5848/6678/files/64820656252.pdf
    • https://cdn.shopify.com/s/files/1/0447/4234/4853/files/goniwulowunerijit.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/74992423198.pdf
    • https://static.usrfiles.com/ugd/74a852_06af1ea711c84b7ba96e17093f538302.pdf
    • https://static.usrfiles.com/ugd/3254bf_d36681125e80444c82fe702b9f3ac40e.pdf
    • https://static.usrfiles.com/ugd/516793_753b2195c53f459297aca8d3d24c19dc.pdf
    • https://static.usrfiles.com/ugd/9904c2_a01099fc7a704d918afc8d2cc794302a.pdf
    • https://static.usrfiles.com/ugd/dc98cc_a50a45c061fe4bffa23b8621cea0fe5e.pdf
    • https://static.usrfiles.com/ugd/99965f_c5fd049db107401c980f47f72837460a.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_d8ef454e990e4648952db3f210dfe451.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a2b4f95692f4b54b6e802b59bb32fc5.pdf
    • https://static.usrfiles.com/ugd/9ea91e_372356efbb784d61af219ed095ef8898.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066f5.bin
e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F5 2952 bytes
font_01_sfnt_off00007183.bin
837dee3e48e6312abcee33215ced88b4fb878dd353e8b3ed391e96e4187abeaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7183 4936 bytes
font_02_sfnt_off00008255.bin
240fb7bebf33b747aa6bade5908ae3e20d053c5c65754dc2ce7e2213f98a3655		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8255 10308 bytes
font_03_sfnt_off0000a586.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA586 4324 bytes

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