Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a7cc2bb24167df6…

MALICIOUS

PDF

43.5 KB Created: 2020-08-31 11:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b09c7801a5bb77e9072254ee2a29e246 SHA-1: 19734ad776bf4185c077816f11c06ebdcd2cf6e0 SHA-256: 2a7cc2bb24167df608b4b98c6f0dfc67ab8c154609d7c2992571f221ab8efaa8
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains text related to 'free download song' and the malicious URL, suggesting a lure. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting the user to malicious infrastructure via a deceptive link.

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.club/wix?keyword=free+download+song+high+heels+te+nache
    • https://static.usrfiles.com/ugd/b8c837_0abcaceee78f4e7dbff6621253b4b752.pdf
    • https://static.usrfiles.com/ugd/d5cf39_1de97a6e8a9745a29f16a5c378c68fc5.pdf
    • https://static.usrfiles.com/ugd/58a813_b5cddd0b242f486dbc239a5bf65d68ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_5def78df6d9a4c24803373e69d6f63c3.pdf
    • https://static.usrfiles.com/ugd/8b97dd_81a6311703664802ab5816c45105f251.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0be487f52944c82adfb2723d1fd4d16.pdf
    • https://static.usrfiles.com/ugd/b8c837_da00b4db468d47fd86cf241cd1d0a477.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4a1241efb154e09aea32844d3733e53.pdf
    • https://static.usrfiles.com/ugd/32acb1_0a4377a115d44a2c85265af4cf0d2a9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e75b790cbea4b9398d784f0834df93e.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_23ecb2ba3d5c4680862e653473843d3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_274da813579f432e9db73af3b685073c.pdf
    • https://static.usrfiles.com/ugd/9c0842_606792c172944907bfbc613792b81750.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_off00005d29.bin
d2ca9eea7e02da06b5de9d968f0dd6a6750d6326de1f328278511d30fe3401f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D29 5248 bytes
font_01_sfnt_off00006f07.bin
054130a44dd838634469b7f192fe2a582a5c9f8f32a103ac4d3d3ec9e93dce81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F07 15592 bytes

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