Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8a0fdf2943151e…

MALICIOUS

PDF

47.6 KB Created: 2020-08-31 07:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcef4f472dc26c913d1f3d68d66fb85b SHA-1: d480717e96df36fe04b4ef1194261335b5c5f002 SHA-256: 2e8a0fdf2943151e3b3c3fcb7ada50bffa420fa11f44508e86a0c73ce5c42778
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external PDF links, with 'static.usrfiles.com' being a dominant host. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL, suggesting a lure or redirection attempt.

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=blades+of+khorne+2019+pdf
    • https://static.usrfiles.com/ugd/764aaa_c205e9768ea746b1a53a812ef423d13f.pdf
    • https://static.usrfiles.com/ugd/7dd30d_1b984ff2ed264c16a2e1a1fcd7c0f4cb.pdf
    • https://static.usrfiles.com/ugd/a107db_aa9f353501c84f3d957301b9c0eb69a9.pdf
    • https://static.usrfiles.com/ugd/82e28d_fbb57590b52f469eb61028cd3a964f0e.pdf
    • https://static.usrfiles.com/ugd/87a178_dcec080b082843469420e0b53c0e4cdd.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbc3e5146f5d47b9bd1c8682daaed1fc.pdf
    • https://static.usrfiles.com/ugd/98857b_1c0b916c48f443fd88b1c865eab38ecf.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/legobowupufanukugubo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/77597327490.pdf
    • https://cdn.shopify.com/s/files/1/0433/9010/7815/files/phonology_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0454/2916/2152/files/lagu_hargai_aku_armada_stafaband.pdf
    • https://cdn.shopify.com/s/files/1/0434/4614/1093/files/fofuvawurap.pdf
    • https://cdn.shopify.com/s/files/1/0459/9277/1741/files/manual_chrysler_neon_2000_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/pufora.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_off00007b50.bin
fffaef327b2a03770c8c21f2beb2f7dd4541a02433ef00da86277c70b17e7765		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B50 5724 bytes
font_01_sfnt_off00008ebf.bin
b6229d212ef78c591782d48fffe14f33d68ac190cb6355e41efe59c97dd0544c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBF 10212 bytes

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