Malicious PDF — malware analysis report

Static analysis result for SHA-256 31575ddc1375bb55…

MALICIOUS

PDF

47.1 KB Created: 2020-07-31 20:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 616ea2423f09e3b5bb115aa783694177 SHA-1: c970052e732444c682562606909216eb2c43ae1b SHA-256: 31575ddc1375bb550a015fa752756443327ae3fd93c71e89d8ec09331dd2b643
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=implicit+vocabulary+instruction'. Additionally, it exhibits characteristics of a PDF link farm, embedding a large number of external links, many hosted on cdn.shopify.com. The document body is heavily obfuscated but contains the redirector URL. The primary intent appears to be directing users to malicious infrastructure through a deceptive link-based lure.

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=implicit+vocabulary+instruction
    • http://files.adelanteknox.org/uploads/1/3/1/4/131406140/jonim_renazitubenupob_rekizijuvur.pdf
    • http://files.ancientwavestudios.com/uploads/1/3/1/4/131483685/kinawa.pdf
    • http://files.anchorcounselingwellness.com/uploads/1/3/0/8/130874125/4281383.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/gapugikazor.pdf
    • https://cdn.shopify.com/s/files/1/0438/1219/2413/files/nirugakoxadexofaniro.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2828/files/64046890170.pdf
    • https://cdn.shopify.com/s/files/1/0430/5931/4841/files/35106513832.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8661/files/29268505244.pdf
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/dokukivasizinumasa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2261/3655/files/nemewikajubag.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/6015198991.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/82420584230.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9461/files/salagiredilixona.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/pitiwupobanevaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/80949414814.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/xamofigemokiwitopomov.pdf
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/xovirajuxidesu.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_off00007a51.bin
5025b6aa6d982ae43bb1dae7cf3b16474b53e68f48d993df69a983ec5dcb6300		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A51 5320 bytes
font_01_sfnt_off00008c53.bin
e1e1d97e1e6d862ffcc85d6782f1b2d1659e35e3fcf7a46c4677758a8e0954d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C53 10156 bytes

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