Malicious PDF — malware analysis report

Static analysis result for SHA-256 a17460a493e72a21…

MALICIOUS

PDF

42.8 KB Created: 2020-09-08 06:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb254a9da457941a7e128d692ceb0018 SHA-1: 456d51ee2cb99eb0bacf4060d20d2b094d6beff3 SHA-256: a17460a493e72a21466ec23309166653352d3e3a2f2c610e9b8f14fbf36307d3
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.me'. This indicates the document is designed to lure users to a potentially harmful website. The presence of numerous other links, many pointing to 'static.usrfiles.com', suggests a link farm or SEO poisoning tactic to increase visibility and click-through rates. The ML classifier also strongly flagged this PDF as malicious.

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=carefusion+alaris+pump+8100+service+manual
    • https://static.usrfiles.com/ugd/6924eb_77d23669e3b64ecbb24a8b5885f311cb.pdf
    • https://static.usrfiles.com/ugd/5b604d_e684ee515d5c467c83dde573df8f7590.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_46e4fda3b6314975aed13986938832d4.pdf
    • https://static.usrfiles.com/ugd/733c1f_04260429dd56482f863169909762cae8.pdf
    • https://static.usrfiles.com/ugd/a48928_a1b420e432cd432a8de05fb5b0111bde.pdf
    • https://static.usrfiles.com/ugd/b8c837_57978bbb18fc40db95180635c483c4db.pdf
    • https://static.usrfiles.com/ugd/e78b77_d3d8ae7c3ed2447ca5c048b2b4c6dbbf.pdf
    • https://static.usrfiles.com/ugd/229b11_51d841189bce4ae7862e404f3c0e42d6.pdf
    • https://cdn.shopify.com/s/files/1/0437/1342/9655/files/escala_alvarado.pdf
    • https://cdn.shopify.com/s/files/1/0432/4084/9575/files/student_loan_going_abroad_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c2a.bin
0ce161294dd1c575c1eb728f35af0b4bc181fa417c81740d233ca690a214bd34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2A 5436 bytes
font_01_sfnt_off00006e8f.bin
f29ce7336d909c4b0f7a74c53fe7d04692b1618f7151693f86ce53b6018a599c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8F 9900 bytes
font_02_sfnt_off0000907f.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907F 4324 bytes

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