Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9901b97d9c12bf1…

MALICIOUS

PDF

36.7 KB Created: 2020-08-29 19:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2587045931fd26fb7d128ccb0797f99 SHA-1: ef660806810276e0eabf41542738aa0d3440526f SHA-256: c9901b97d9c12bf1fafb8cad84d227a129a4d43c186f542040eb0c69c173870a
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external links, suggesting a link farm. The primary malicious URL identified is ttraff.cc, which is known for redirecting to malicious sites. The document body contains obfuscated text and embedded URLs, including the malicious redirector and a benign Shopify URL, indicating a likely attempt to lure users to malicious content. No scripts were extracted, but the PDF structure and heuristics strongly suggest a malicious redirection scheme.

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/wix?keyword=instrumentacion+y+control+industrial
    • https://cdn.shopify.com/s/files/1/0434/0511/5544/files/69044113805.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/jitopiroxafidivozuni.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/14520999131.pdf
    • https://cdn.shopify.com/s/files/1/0433/4203/7150/files/ubuntu_reduce_size.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/fusosiwawu.pdf
    • https://static.usrfiles.com/ugd/b8c837_942c5375e538440f8284ddcaf11f1afd.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9e1d09f19614707b9afe083cfef4409.pdf
    • https://static.usrfiles.com/ugd/b8c837_70c57db51c4244df93590711178b9b6b.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/christian_grey_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/jogos_para_ppsspp_pelo_mega.pdf
    • https://static.usrfiles.com/ugd/b8c837_d86637aaf80a4a9192bfc9526af3486e.pdf
    • https://static.usrfiles.com/ugd/09273f_d83910f37e9b401c8cd06214d85c1f1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac8ba9cb165b40049bd01e7c91be5b7c.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_off00004fe5.bin
59593d188ee97d27042d5f2c969e73c2c0c114ba67dedd5771e29460c8369fc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE5 5124 bytes
font_01_sfnt_off00006130.bin
a3bc5ac7eb8f92494c57f1decb5d3bfccf2e836862547387e39a154a42536f63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6130 10872 bytes

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