Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6bf242d74b5cfe9…

MALICIOUS

PDF

38.0 KB Created: 2020-07-27 16:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3c8281c54f2fc96419b0e193cbddcf9 SHA-1: 6cddb725e13e5bd987f21bf7eeee70c8ffdd8454 SHA-256: f6bf242d74b5cfe93f8196c36a1981cf828d4d26db3739beefdee1d8eafe9edd
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to PDFs hosted on Shopify. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring users through the embedded link, which redirects to a malicious site, likely for phishing or further payload delivery.

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=blue+christmas+music+sheet+free
    • http://files.braverthanthewaves.com/uploads/1/3/1/4/131453807/5359755.pdf
    • http://files.crossfitzonedesign.net/uploads/1/3/0/7/130775084/nawegilewesi-gebogefari.pdf
    • http://files.peninsulafap.org/uploads/1/3/1/4/131453022/7972937.pdf
    • https://cdn.shopify.com/s/files/1/0434/5203/9328/files/630087013.pdf
    • https://cdn.shopify.com/s/files/1/0440/3462/1590/files/wemowopawuxusaruzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/govelabuzeriwaxabilox.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/21474162848.pdf
    • https://cdn.shopify.com/s/files/1/0439/0843/2027/files/42990502660.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9762/files/zurut.pdf
    • https://cdn.shopify.com/s/files/1/0437/5897/7178/files/menigovotifosoriwibenapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1040/files/91985367726.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/45627655382.pdf
    • https://cdn.shopify.com/s/files/1/0437/9341/6349/files/71734232707.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/dutow.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/fisalemigef.pdf
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/tuvukigadodiwukekekeg.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/1/0439/0843/2027/files/4299050

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056fc.bin
3b2a9937ea40dc7e51c5a0db72c02449b0932ad95515e0dc9b8065081cc208d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56FC 4836 bytes
font_01_sfnt_off00006767.bin
cadbf621cac6a025a42d8ff69942c3e606ca691501d01d15530fb978a3b769a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6767 10448 bytes

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