Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfc9225089e350d…

MALICIOUS

PDF

43.6 KB Created: 2020-08-19 09:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf49dec65ebfe949d646210a3c80d6dc SHA-1: 752e2e145188787f77a78d8e004820c975678e12 SHA-256: fcfc9225089e350dba0f313a465e155f81532d37e9dfa3c1d79288aa9716d85c
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'kindergarten math counting money worksheets' and a URL that appears to be a redirector. This suggests a phishing or scam attempt disguised as educational content. No scripts were extracted from this sample.

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=kindergarten+math+counting+money+worksheets
    • http://files.junedulshahid.com/uploads/1/3/1/3/131384070/zizejobod.pdf
    • http://files.sunpawco.com/uploads/1/3/0/9/130969440/1998982.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/mifulasexenuwitipadove.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2115/files/nizuzoretozejumetemifoli.pdf
    • https://cdn.shopify.com/s/files/1/0431/5522/6778/files/jesisejaporakosisisozegon.pdf
    • https://cdn.shopify.com/s/files/1/0437/0569/6409/files/xapawagonerivisusi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/ramuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mujunevuduw.pdf
    • https://cdn.shopify.com/s/files/1/0432/5035/2296/files/health_economics_bhattacharya_download.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_off00006715.bin
a29e0b7eac3346507bd7fb3e43f0102d7cca2de52b329c77c4056742ac2d2de2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6715 5548 bytes
font_01_sfnt_off000079cf.bin
cb3fc81ebf69a4bcd0bdcae11830543cb79983d02686b93727aa8217b6f62dfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79CF 12488 bytes

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