Malicious PDF — malware analysis report

Static analysis result for SHA-256 524dc4a4efcb8b53…

MALICIOUS

PDF

34.9 KB Created: 2020-09-13 05:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01ef9ac07afb7dae980225371fc08aba SHA-1: dda562dd553eab19c4ed672db0b744a2f2b919d2 SHA-256: 524dc4a4efcb8b53e2696a003a8895c414d96706493b28b242c2e94a9325868c
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.link, which is likely used to deliver a malicious payload. The document body, though heavily obfuscated, contains the same redirector URL and references to game-related keywords, suggesting a lure to entice users to click the link. The presence of numerous other PDF links within the document further supports a link farm or redirection strategy.

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.link/wix?keyword=ninja+painter+unblocked+66
    • https://static.usrfiles.com/ugd/f103bb_b5623fb8bb72420a89b84ccf01d295db.pdf
    • https://static.usrfiles.com/ugd/d1fcfc_6dfd3e8a97134f0182b99c89d169bc0f.pdf
    • https://static.usrfiles.com/ugd/89064d_c7bd8a304a6b4666a2291296ad77ca28.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_dcc7f2b23eef4f1abcfd9ca812ec4364.pdf
    • https://static.usrfiles.com/ugd/38eac1_ac8107cf87b04579b47527552e7df3ba.pdf
    • https://static.usrfiles.com/ugd/f68081_154305e7277a41dcbb04207de55337cf.pdf
    • https://cdn.shopify.com/s/files/1/0438/7926/8520/files/gixawajamasolivekuge.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/lofajeweniw.pdf
    • https://static.usrfiles.com/ugd/e4ff69_7a2c832622a44bb0a93c1b6f0ad0bebf.pdf
    • https://static.usrfiles.com/ugd/8aba0c_020949ab1f204b4aadc4d2601ef24d33.pdf
    • https://static.usrfiles.com/ugd/4826f5_a1b48957d45e42afac2274c440e71704.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5334062b76041b4906fa610bd60d58a.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_off00004a98.bin
df86d405a63df28b1cab5d70aa9697b46b54ff83f6e360c87730e0ec82a09758		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A98 5292 bytes
font_01_sfnt_off00005caa.bin
bd22dea59a5eab28623549b8aa16a4ddb0d7868e439099a7dbebc687f5243f8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAA 10032 bytes

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