Malicious PDF — malware analysis report

Static analysis result for SHA-256 35721cd8c1e66917…

MALICIOUS

PDF

43.3 KB Created: 2020-08-01 14:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 054c6f177f5e84737d0bab9fbd82868e SHA-1: 339fb0ff08f879c3f286130235416caa20a030e7 SHA-256: 35721cd8c1e66917d1fcad56600f9eb7876bf1e34f65912cbccca5a61a3c7801
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The primary malicious URL is https://ttraff.cc/pify?keyword=merge+bam+files, which is likely used to redirect the user to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=merge+bam+files
    • http://files.bandofgypsiesranch.com/uploads/1/3/2/3/132303170/8787153.pdf
    • http://files.wereready.org/uploads/1/3/1/3/131379540/8127577.pdf
    • http://files.neilestrickgallery.com/uploads/1/3/2/6/132681415/3356331.pdf
    • http://files.micheleknightleyartist.com/uploads/1/3/1/3/131398419/7260227.pdf
    • https://cdn.shopify.com/s/files/1/0428/7427/3948/files/96493171293.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/bumofowituwela.pdf
    • https://cdn.shopify.com/s/files/1/0429/2552/3103/files/duduluposotofuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/49312050841.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/sisujuneribefibax.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/75691416106.pdf
    • https://cdn.shopify.com/s/files/1/0432/9963/5355/files/sozubowimizogarumemowi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97428896976.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/babape.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_off00006921.bin
bdba1ce7509daf7982b54bda2875f229433d5eab25453adc5b2c970858d57090		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6921 5232 bytes
font_01_sfnt_off00007aeb.bin
30e0a1f547b70a9ac16d7fa87256ed5e6139d8350d8ac921a1012e8b6f6d2836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEB 11220 bytes

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