Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff0117b3b4aab3e…

MALICIOUS

PDF

34.4 KB Created: 2020-08-30 19:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99744486bd724b13b8fb0feab4da5200 SHA-1: 4ec50b2befcee5d0dcd00da9a580b7b8645fe1a8 SHA-256: 9ff0117b3b4aab3e0471ea5e43582e057f963f18dac5608ba81e963123448f7a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, further supporting the malicious intent. 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.com/wix?keyword=suffolk+punch+17s+petrol+cylinder+mower+spares
    • https://static.usrfiles.com/ugd/6116da_b35e71ad96d34ffa9ea46f435086aceb.pdf
    • https://static.usrfiles.com/ugd/a59130_c147d25ecef54355a0b8277446d6932b.pdf
    • https://static.usrfiles.com/ugd/ca300b_f110a6bffabe467d8416c471bc5cd0f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_79c122cbb9e543bfa8fee33298bd20e3.pdf
    • https://static.usrfiles.com/ugd/48d9a1_558526a1d196487d8b0d59ec27aed06b.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e41bf04d25d40b1af3d2ff4f7f16f33.pdf
    • https://static.usrfiles.com/ugd/565485_b77762532dff4915ba20d85c03ee21aa.pdf
    • https://static.usrfiles.com/ugd/3eed2b_a9636eed5e19439aa864c21a707dd21c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5431cf09338943e1aea18224c43422c1.pdf
    • https://static.usrfiles.com/ugd/63d3ad_d47b02e9efe24a498485766094e54a10.pdf
    • https://static.usrfiles.com/ugd/b8c837_a292157288c34cb6a8fde7ba316f5abb.pdf
    • https://static.usrfiles.com/ugd/451461_c8a6fb94d5634f0ba6305ad1f8b2e067.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5457d31b2ec4059a31b98aa8781f0d3.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_off0000477c.bin
8c645ba0c7ead8e2a8e55d6d7dddee18ded2ec679048b1f941f1934a289721d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x477C 5888 bytes
font_01_sfnt_off00005b87.bin
99598f841bc5996a63c3cea66536c90be3d7c6cc2042b41af92599eee13837d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B87 9660 bytes

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