Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb709def234108af…

MALICIOUS

PDF

43.4 KB Created: 2020-08-02 15:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcd725ec5bb69c190e4774bd6eb0eb44 SHA-1: 41a9f6be032b6f94bce8f445dd1e766303bfe9d6 SHA-256: bb709def234108afeef6dff404a5870e44699e17df69e8c9997227d841b9258d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm behavior, with many embedded links to external PDFs hosted on platforms like Shopify and other domains. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be SEO manipulation or redirection to malicious content, leveraging a large number of external links.

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.com/pify?keyword=bis+resto+druid
    • http://gixemew.nemescreative.com/uploads/1/3/0/8/130814017/nokozowek.pdf
    • http://files.dougsgaragellc.com/uploads/1/3/1/3/131379540/ferolu.pdf
    • http://files.nvrenstore.com/uploads/1/3/0/9/130968996/giwezag.pdf
    • http://files.deevineimaginations.com/uploads/1/3/1/0/131070992/3350852.pdf
    • https://cdn.shopify.com/s/files/1/0440/2990/2998/files/2323004932.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/sivabitosobulaniv.pdf
    • https://cdn.shopify.com/s/files/1/0441/0625/2440/files/webodetot.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/62157360507.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/dedalapuzorud.pdf
    • https://cdn.shopify.com/s/files/1/0431/9477/7757/files/python_pig_latin.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/bold_fonts_css.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdf
    • https://cdn.shopify.com/s/files/1/0428/4514/3207/files/runulakul.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7448/files/47527183419.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/48721177210.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/72170034049.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/files/1/0433/8286/6072/files/dedalapuzorud

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ded.bin
6d9b914084c3b7b78ca33db82b517b858eee64d2e21c78d0d3425ffdea2c9e76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DED 4624 bytes
font_01_sfnt_off00007db6.bin
fa9f57b567c7e35fc154bddd2028846d743ef08f1a6697c2b499f6fe70b68a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB6 10240 bytes

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