Malicious PDF — malware analysis report

Static analysis result for SHA-256 318f6fbbc2324376…

MALICIOUS

PDF

41.1 KB Created: 2020-08-30 19:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1f144cc3f70e7ae43270ae778165795 SHA-1: 1a53a6b0a9dd2a11d1846285e259b7160b6a9a17 SHA-256: 318f6fbbc232437648bf61427c6546e8c8f3e90a8b0464d228f9e8d09009d1ca
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 'https://ttraff.com/wix?keyword=zathura+a+space+adventure+full+movie'. This URL is likely used to redirect users to malicious content, disguised as a movie link. The document also contains a PDF link farm heuristic, indicating a large number of external links, many of which point to static.usrfiles.com. The ML classifier 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=zathura+a+space+adventure+full+movie
    • https://static.usrfiles.com/ugd/b8c837_594cb46aeb294b708e9e0dda55034593.pdf
    • https://static.usrfiles.com/ugd/b8c837_85f6f5ce8cc248e7a4413e0384b2d39e.pdf
    • https://static.usrfiles.com/ugd/704566_ac5bbd780bb84add9b09731dc6f4c391.pdf
    • https://static.usrfiles.com/ugd/b8c837_997ae683a9c349bf93a1d04be82e9c43.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5eb673b6412452e94fc6eca72eff72b.pdf
    • https://static.usrfiles.com/ugd/921909_3fcdfa40ec134868b80e6dec49a95cb5.pdf
    • https://static.usrfiles.com/ugd/2e16aa_62ddac82a7fb439c819f27edfd60bce8.pdf
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/easy_diy_aquaponics.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/auditorium_design_project_report.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa7e630b75144777b9c696b8f76a9ba5.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9843def85c248e6a25c0dfb447b3b62.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_348651e88dc8465090173535c0da3145.pdf
    • https://static.usrfiles.com/ugd/a59130_208441f288c64bbbbd927c7689d81a75.pdf
    • https://static.usrfiles.com/ugd/b8c837_8731ca8a8b6c45afb1c21e8d644fb998.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_off0000519a.bin
fd6f4d0eeb02060da24e2bd0ecea386aeed0ea1f5b3b58144ce7171a14bbdf38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x519A 5296 bytes
font_01_sfnt_off00006379.bin
d022822cd99928c5544cc706ef674f85a0c3dde330ead01b0b3472f95162f405		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6379 10616 bytes
font_02_sfnt_off000087bc.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87BC 4324 bytes

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