Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5217be4f29b63e…

MALICIOUS

PDF

35.7 KB Created: 2020-08-30 14:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2ca9e526f37fe9196a5bdfc8945babf SHA-1: 7948e903a6f58381521360bb2cb8588157251eb6 SHA-256: 1f5217be4f29b63e549a06c419f882a6ec90ca61bc3feea12251c98405e7b96a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique often used for SEO poisoning or to direct users to malicious sites. The primary malicious URL identified is a redirector, suggesting it's part of a chain designed to deliver malware or phishing content. The ML classifier strongly supports the malicious nature of this PDF.

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=ooka+miko+vrchat
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/programming_language_pragmatics_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0447/3962/5111/files/ny_subway_map_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/33640518819.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5235/files/95641364809.pdf
    • https://cdn.shopify.com/s/files/1/0437/6903/6962/files/48081279649.pdf
    • https://static.usrfiles.com/ugd/10b11f_6ea21ba756724eeaa0216b0598ec6dd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_5277eca5a5074731b7d767ee6dcde841.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_a99b6f66f3bd40f3b4a0cba41e25b99b.pdf
    • https://static.usrfiles.com/ugd/b8c837_89144cee0e56416bb73b154dfc3b7f77.pdf
    • https://static.usrfiles.com/ugd/b8c837_bcff9035c4ab40208c0361b61cea1376.pdf
    • https://static.usrfiles.com/ugd/f967ac_3842b7313a714922a213828d4c5dbfcf.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e3a30113151436e925358d05a45388e.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f20a658b6594a728d1e632be534843f.pdf
    • https://static.usrfiles.com/ugd/19103d_14f1e438b301411baa66e2cf4c44e98a.pdf
    • https://static.usrfiles.com/ugd/b8c837_be15e82486eb4077ada1821a06a4844a.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_off00004db5.bin
be91fa0acbe14cd22e985ccaa6bb11e528f56112efe3519dbd9768c0f1416fa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB5 4980 bytes
font_01_sfnt_off00005e84.bin
c2a52941a4bf369011b81ff86b28843b276d209416bd2201cfbdf614b6aa5984		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E84 10552 bytes

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