Malicious PDF — malware analysis report

Static analysis result for SHA-256 30db932d2d8b2d1e…

MALICIOUS

PDF

39.8 KB Created: 2020-08-31 15:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bca4e3bdd66d0c5c9ee7c376159d1a4 SHA-1: c54c4e525055c29e81e6a8f8f0d5f683904343ce SHA-256: 30db932d2d8b2d1ec2b2b51cc19907df1803204873451d4aa266f8263e7ea4b9
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure, which includes a large number of external links, characteristic of a link farm. One of these links, found in the document body and identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK, points to 'https://ttraff.com/pify?keyword=korean+hangul+keyboard%2528+beta+apk', a known malicious redirector. The file also contains a large number of other PDF links, as noted by the PDF_SEO_LINK_FARM heuristic.

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/pify?keyword=korean+hangul+keyboard%2528+beta+apk
    • https://static.usrfiles.com/ugd/b8c837_fa829b9a6f544f60a9efa262c31d1fb0.pdf
    • https://static.usrfiles.com/ugd/fbccce_fa4c5115f05e45c9834eae941a61b355.pdf
    • https://static.usrfiles.com/ugd/39cb9d_ce428506b37c4d08badcb86847dea1bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_784bfa14201d4a65a47962ecca116fc2.pdf
    • https://static.usrfiles.com/ugd/b8c837_876449ef327f4cc7a744b2149235bcaa.pdf
    • https://static.usrfiles.com/ugd/33a16d_195581dcce9a4338be2d2c76dd36680d.pdf
    • https://static.usrfiles.com/ugd/b8c837_5115728ce64343c68e1683551c93fbcf.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_7e2a1f6b3c3c4e1fa39fee561da74270.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6301/files/tabiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/67282688461.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5965/files/sevonopajopojemetobekozu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/92277088859.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/2020_calendar_printable_with_holidays.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/
    • https://cdn.shopify.com/s/file

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fc6.bin
e39a6274ec4b80876e5b576e589a124bad77de47a08d4daad945cbc329527956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC6 3812 bytes
font_01_sfnt_off00005d81.bin
0ff6577e629126d6669a607fdce598f087406ca761a2f2eb3cb5fc216b2f093a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D81 5396 bytes
font_02_sfnt_off00006fdc.bin
20029a6e1cc8f2f7c55403c3d55f5265f016b2d1f4ec13d458bca9c6967ee279		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDC 9880 bytes

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