Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf20d41eda7d15b…

MALICIOUS

PDF

42.7 KB Created: 2020-08-18 13:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4802fa567a3053f5aae60d335a320779 SHA-1: 6c0944ec532b45ea242e1ae3befcd91be32e7ea3 SHA-256: 8cf20d41eda7d15b046825f519b70afbddf1cce6c2102fdf5bfb95b6c3c5554b
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, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Games not in play store' and a URL that appears to be a lure. The file also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm techniques used to obscure malicious intent. The primary malicious IOC is the redirector URL.

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/pify?keyword=games+not+in+play+store
    • http://files.bahamianmom.com/uploads/1/3/1/0/131070911/2809856.pdf
    • http://files.handmadebylouisa.com/uploads/1/3/0/7/130775827/25f7f89e987e0.pdf
    • https://cdn.shopify.com/s/files/1/0438/4037/2896/files/laboratory_technician_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/4232481095.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/56595870663.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/kuwarexuve.pdf
    • https://cdn.shopify.com/s/files/1/0429/0209/3987/files/77722406945.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jeravutudab.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/21754733844.pdf
    • https://cdn.shopify.com/s/files/1/0439/1868/8424/files/gevolilomifofu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7112/7206/files/12350838071.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_off00005cda.bin
077baa4509b32b64052fb843d73d50325e37f1bd1b7ba784fcd5fdb2dab06970		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDA 4884 bytes
font_01_sfnt_off00006d62.bin
a7735ca7588cc536573231399355aa48f9203cdfd8e095ba60e29fd05e5c9413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D62 10196 bytes
font_02_sfnt_off00009048.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9048 4324 bytes

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