Malicious PDF — malware analysis report

Static analysis result for SHA-256 990e5882145c400a…

MALICIOUS

PDF

55.4 KB Created: 2020-08-30 08:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac1b77025f42ebba347da8a819b2d87f SHA-1: dd17f96e64eeb1554950d71dff0e155a63d6df9e SHA-256: 990e5882145c400a584cc5a7da366af1dc9033a7788c1fef5105e1e121567ca9
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.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link within the document.

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=emotional+freedom+judith+orloff+pdf
    • https://static.usrfiles.com/ugd/50c35f_8208db9bf3ff4143b939ad7f9f731edf.pdf
    • https://static.usrfiles.com/ugd/97aff7_58d43243dd014e57bbdfa6c05b42c716.pdf
    • https://static.usrfiles.com/ugd/b8c837_33d8c61b388f47fc97ebbf1c00f5c01f.pdf
    • https://static.usrfiles.com/ugd/ed64d2_7d9ca34a73da4cc5acaae2c32fbe7673.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/pabusunubemi.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd09ff8b39dc45ffbba8d63e1564af44.pdf
    • https://static.usrfiles.com/ugd/b8c837_29722c605d6244a189447036c365eea1.pdf
    • https://static.usrfiles.com/ugd/9c0842_d2c085253c7e449986584d1837ac6112.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6ca7f822b834568a74c277fe4f93ac5.pdf
    • https://static.usrfiles.com/ugd/b8c837_5777a192ccd9406ba460dadb22044fe9.pdf
    • https://static.usrfiles.com/ugd/865d50_bbbb5603bddb4ca5ace31d1537854c4c.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_3fa2678738f9474e916de7723a1b5c9c.pdf
    • https://static.usrfiles.com/ugd/bb13a2_6873a6ff3041432097d3b3c0c38441b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8db61c4f5e14e4f851e78469309912c.pdf
    • https://static.usrfiles.com/ugd/b8c837_95bde3f0ece449be9e72462082bb8498.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_off00008229.bin
7a920e280b836f5fd4fd6c0d4f2cce70165d859bf2be3ed2bace7a671e613663		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8229 5136 bytes
font_01_sfnt_off00009367.bin
52161cda653875975d098e92f557c10cdec19b412b600763a9d0ce98643c197e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9367 8916 bytes
font_02_sfnt_off0000ac69.bin
66c6ea5afd111a31c47fadebe91efbc92d0712973c6431764d673b321d8339e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC69 10500 bytes

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