Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43f1c410446949b…

MALICIOUS

PDF

36.6 KB Created: 2020-08-30 16:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb9ab3c944ebc88f700cef4c244fe598 SHA-1: cca995f02cc1837274f198f299bb059a10d53764 SHA-256: b43f1c410446949b61244710d220438e1d6af83f0aadd9e47f148917cdf8b89a
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Lametric wifi clock' and the authoring application, suggesting a lure for a product. The primary malicious URL identified is https://ttraff.ru/wix?keyword=lametric+wifi+clock, which is likely used to redirect the user to further malicious content.

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.ru/wix?keyword=lametric+wifi+clock
    • https://static.usrfiles.com/ugd/0511f5_5e25451d35ba4e1aa02408280e01132b.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_1a6ef67eacd8450ba62701cbebcae910.pdf
    • https://static.usrfiles.com/ugd/b8c837_e022dddd4185465698943bf8c13a8487.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f15608759e54404a0a0ecd47c394b6b.pdf
    • https://static.usrfiles.com/ugd/4b874d_c4dec0bcdf794d20aab084d2a242b397.pdf
    • https://static.usrfiles.com/ugd/b8c837_79205009721042c7a088d05b4efaf80a.pdf
    • https://static.usrfiles.com/ugd/b8c837_43733c1196504b1db6c4a34a0a534cd8.pdf
    • https://static.usrfiles.com/ugd/b8c837_62c92dce655a4d91887ee47f0ac6917d.pdf
    • https://static.usrfiles.com/ugd/963627_198fb17d3375435eaf8d291057ead1e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7b4058e02c947d09a2cf0f90eecc184.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c31558bff1c4664b5282cef82c857d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab510ceca5b543cf8b782a77f8b8efb8.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_off0000507e.bin
679d3d4268ba40db08e7cf18d408d4d94c565c7a4d282d4c1c6cd4529b33bdfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x507E 4948 bytes
font_01_sfnt_off00006155.bin
96a36cccdb25396145de4dca4f37158e71c4482bff1e54b729e113d2d8714637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6155 10764 bytes

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