Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb153b559aabb2f…

MALICIOUS

PDF

39.1 KB Created: 2020-08-29 20:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0fd93cc20ecfbf3911781532320aa3d SHA-1: 6171ff3f265c94a05bca5f23b873fc58aadef00a SHA-256: fbb153b559aabb2fd95dc1a1b15759f46727ffafd9ad8d3f6c42ce42271a535a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com). The document body, though heavily obfuscated, contains text related to 'Stephen Hawking libros gratis' and the redirector URL, suggesting a lure to entice users to click. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the malicious nature of the redirector. The ML classifier also strongly indicated maliciousness.

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=stephen+hawking+libros+gratis
    • https://static.usrfiles.com/ugd/b8c837_059c75bd1f784c759520fbf3d2df20cb.pdf
    • https://static.usrfiles.com/ugd/26481d_265fb11345b64de4830e706d34c8287f.pdf
    • https://static.usrfiles.com/ugd/b8c837_10c490bdd8774643ac54b12024c3efec.pdf
    • https://static.usrfiles.com/ugd/b8c837_88904ce861b84e1291fde0a62d2f283e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f73c7d0a84141f9b3453a32242d03eb.pdf
    • https://static.usrfiles.com/ugd/8b97dd_b6cda2b4b5c14ba5a6ee16bcefdbb663.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2a34f99e45c4631a1cac9d382272220.pdf
    • https://static.usrfiles.com/ugd/b8c837_4dfa1a30a0d64db19f2ec923a0b92adf.pdf
    • https://static.usrfiles.com/ugd/b8c837_462a32b997ce4dbf8f8589a801444202.pdf
    • https://static.usrfiles.com/ugd/b8c837_d78750bffee4420ba8832f112fc40169.pdf
    • https://static.usrfiles.com/ugd/b65acf_6aef9784cc7a4767aa448ec1760f0458.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d907472fcd54df29e0c118fb13c0739.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_off000057f3.bin
a9e2f4d57014306222ab97ed1166c87c6d61c3ccfb660c1ce7b05f4c3c36bc31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F3 5480 bytes
font_01_sfnt_off00006a9c.bin
2a051798f768ad114146d109854e699d07a38a0e3894f8b23e0a2e1cd9b821bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9C 10560 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.