Malicious PDF — malware analysis report

Static analysis result for SHA-256 832442a01f8ba05a…

MALICIOUS

PDF

36.9 KB Created: 2020-08-31 05:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a784d2720e54430ca46624271c5b89e2 SHA-1: 9903db6fd2b9b53fbc764fe366aed29b78fbd6ee SHA-256: 832442a01f8ba05a698abab2d9300b5b44487fbb607e5f0cc06045ca64df5b76
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a link farm. The embedded URL points to 'ttraff.com', which is identified as malicious infrastructure. The document body, though heavily obfuscated, contains references to this URL and numerous other PDF links, indicating a coordinated effort to distribute content through a link farm. The primary intent appears to be directing users to malicious sites.

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=tamora+pierce+epub
    • https://static.usrfiles.com/ugd/ab059d_aaef15044c2c43b3bf601612bfb67c37.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b9e23b4b9934d2db19b0d21ea6496d7.pdf
    • https://static.usrfiles.com/ugd/12f4eb_30de00ff17a34968aaf5932490a053c6.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9610/files/dejopawisunutex.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/93078755282.pdf
    • https://static.usrfiles.com/ugd/299074_3fae6e6ba1244d3ca4422d75fa8b671c.pdf
    • https://static.usrfiles.com/ugd/2f8cea_489ec9fdd971428683ca13850db45853.pdf
    • https://static.usrfiles.com/ugd/f3cb45_216ab013a6154e978d8fc245a11685cb.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_983d6636e78e448789a3b0b35edfb1a8.pdf
    • https://static.usrfiles.com/ugd/7f16bd_70c25fe4d61446cbbec99c7398e659d9.pdf
    • https://static.usrfiles.com/ugd/de3d83_5143218b1db5412d8ac8b76d6456db00.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_e3a547e50d984fc993f875a40164f3f8.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_off00005427.bin
591038c7d661b7e90aa7aeb578b789ccc3c81665a85946ea099ab0a8a1288028		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5427 4960 bytes
font_01_sfnt_off000064ea.bin
6acda6ec0d7b0d69f4ff446f6c3cae13d4db6587e40c22cd9e7f29159b04c8af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EA 10044 bytes

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