Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb47c4add20d809…

MALICIOUS

PDF

52.4 KB Created: 2020-08-30 08:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 656f76c7863d75cdbd64f625a09712f4 SHA-1: 72359118270c966e4daa2d5212a744acc4084590 SHA-256: edb47c4add20d8092e959fbf804f944ea897490660260618f965562eced94585
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a heuristic identifying it as a PDF SEO link farm. One of the primary URLs, 'https://ttraff.ru/wix?keyword=legend+of+grimrock+2+console+commands', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links to 'static.usrfiles.com', suggesting a coordinated effort to drive traffic through potentially malicious or deceptive means.

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.ru/wix?keyword=legend+of+grimrock+2+console+commands
    • https://static.usrfiles.com/ugd/f14cf6_9d1ea0d567da49b1ae0acf05d824d055.pdf
    • https://static.usrfiles.com/ugd/91e123_4af9e34aa2af41259d4211345a07ed74.pdf
    • https://static.usrfiles.com/ugd/9c43ec_6a838cb666da4bc5a95c8bd20e7d8b92.pdf
    • https://static.usrfiles.com/ugd/1be480_ea72ffcda4244de0b6c55428a488c255.pdf
    • https://static.usrfiles.com/ugd/b8c837_22fa81a503de44cb98ed65745980b252.pdf
    • https://static.usrfiles.com/ugd/b8c837_779a8f071e7742d2b48e30c0235c4d51.pdf
    • https://static.usrfiles.com/ugd/b8c837_2977d4f4b08f41228e7cb93640987667.pdf
    • https://static.usrfiles.com/ugd/b8c837_6366f00460ca466b9f98981ffee03785.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/free_download_aadhaar_card.pdf
    • https://cdn.shopify.com/s/files/1/0432/1945/2072/files/92601012037.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/59235318330.pdf
    • https://cdn.shopify.com/s/files/1/0463/1907/5485/files/54499373251.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_off00007789.bin
f03ddb52c4009beb4cb817c0fed7fb020f72d9d8aeaff2ce9bae75d5a599549c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7789 5188 bytes
font_01_sfnt_off00008918.bin
6e574a7b6c8994ebda06426b3632a3eb4ad4eb33d61d26fb6dab83948b456de5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8918 14612 bytes
font_02_sfnt_off0000b6dc.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6DC 4324 bytes

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