Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48a7344f3e08473…

MALICIOUS

PDF

41.0 KB Created: 2020-09-03 10:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0792a2a055e8b3fb39d57a1fc947183 SHA-1: 90911750e48d4e594406736def80a4eb3457d486 SHA-256: e48a7344f3e08473713fb167e27a018255d489a3a97bfc0bef588b1f6c5025d3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector, https://ttraff.me/wix?keyword=personality+test+questions+and+answers+samples, which is presented as a personality test. This suggests the document's primary purpose is to trick users into visiting 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.me/wix?keyword=personality+test+questions+and+answers+samples
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/zimifugezikaza.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/non_conformance_report_form_iso_9001.pdf
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/m_tech_aerospace_engineering_syllabus.pdf
    • https://static.usrfiles.com/ugd/921909_19c97fd5ee15405fb439059b7e69cc45.pdf
    • https://static.usrfiles.com/ugd/1f2646_fd4474f65e964e138f4ac59081ac2bf1.pdf
    • https://static.usrfiles.com/ugd/b8c837_2144100e9be34a09ba9a82ea531e3fca.pdf
    • https://cdn.shopify.com/s/files/1/0441/0369/6536/files/59664294498.pdf
    • https://cdn.shopify.com/s/files/1/0428/9072/3487/files/78546292100.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/guxiwetut.pdf
    • https://cdn.shopify.com/s/files/1/0463/1933/7632/files/benujipo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4082/3706/files/international_marketing_strategy.pdf
    • https://static.usrfiles.com/ugd/de3d83_b18a2d3bd73646509df5a00c41ea5c60.pdf
    • https://static.usrfiles.com/ugd/63f22d_94aa71569b4b47329102f463044fe4f8.pdf
    • https://static.usrfiles.com/ugd/269bb8_cb6a3968e231425bb0ab960495e73916.pdf
    • https://static.usrfiles.com/ugd/dd6616_6332b2893f8b4fe489d25ecd11825c4a.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_off000060ad.bin
c667f5005b10377747a36f3eb4e0ad36b077b45adf3c46310efb33d47886439f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AD 5428 bytes
font_01_sfnt_off0000731b.bin
c78e7f53e465e9e7de8377cafe7505574782262b5ac55857d392fdc0da902342		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731B 10076 bytes

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