Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c5ca5952dd11ff…

MALICIOUS

PDF

54.2 KB Created: 2020-08-02 17:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00a4e8e55c67e99c1bdab078e60b5c13 SHA-1: 20ec88d7fc4bce166271c7fea7eae157bef52cba SHA-256: c1c5ca5952dd11ff2d5a9ded7c4f355b4e71aa531755cf555390bc2ae26af4de
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a large number of embedded links, many of which point to external PDFs. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body contains a URL that appears to be part of this link farm. The primary intent appears to be SEO manipulation or redirection to malicious sites.

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=banjo+kazooie+minecraft+skin
    • http://files.jonmorris.net/uploads/1/3/1/3/131398085/jalokesavituru_diwedum_lamaxumipa.pdf
    • http://files.snowypeaksoap.com/uploads/1/3/2/3/132302973/a7512c13cdce8e.pdf
    • http://files.growingforwardnow.com/uploads/1/3/1/3/131383398/fd619d27b1dc333.pdf
    • http://files.indianhockeyskills.com/uploads/1/3/0/8/130814717/7919cf.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/famoze.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/42663992473.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4600/files/77620323570.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/5574638217.pdf
    • https://cdn.shopify.com/s/files/1/0434/1265/2194/files/89473341316.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/neduxobilarejatubitunug.pdf
    • https://cdn.shopify.com/s/files/1/0438/4056/9501/files/novaronavakir.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/82751205460.pdf
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/segogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3969/files/sojekolapilafepepareseg.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/37975474321.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_off000096cf.bin
f8a00fb0fa92bd53a07dce8dec2806c96ceeee65e674dd6b1ec1b592b4504661		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96CF 5232 bytes
font_01_sfnt_off0000a89b.bin
f23067499386bbf014e8f9845dd8bd8c6caeb0c063025f625f0058c3efb46e8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA89B 10392 bytes

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