Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12a0533d0d1fd0b…

MALICIOUS

PDF

39.5 KB Created: 2020-09-01 12:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 503a9dbb8a61662feab6eabaf495b8f2 SHA-1: 5968c75c7a3f215fed0d9dea6d5179c3f25097d1 SHA-256: b12a0533d0d1fd0bda85657ab8e1500771b723a47ee5ca2b77125ed9c6ecc1bc
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=apple+airplay+android+app'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same suspicious URL, suggesting a social engineering lure to drive traffic to malicious infrastructure.

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.me/wix?keyword=apple+airplay+android+app
    • https://static.usrfiles.com/ugd/8b9728_286acd9f352645158d61de0d79d8e5d2.pdf
    • https://static.usrfiles.com/ugd/e2f197_156d4160fdf84c30a866a1f53e95cfa6.pdf
    • https://static.usrfiles.com/ugd/b8c837_927c2bf494ff478d8ebdfe818e39c2e7.pdf
    • https://static.usrfiles.com/ugd/f0e51d_5cd1946776d247ff9311505302e43e7b.pdf
    • https://static.usrfiles.com/ugd/6d59ab_6264a76c089649fca7ad0563a3fa47f2.pdf
    • https://static.usrfiles.com/ugd/1f2646_e7ce007b447746caadc3db9598048c4c.pdf
    • https://static.usrfiles.com/ugd/35e1ce_00cb4a4208e64ac48041e847c14cfe63.pdf
    • https://static.usrfiles.com/ugd/4dd980_0d3301cf32e3454b862771618542ecb2.pdf
    • https://static.usrfiles.com/ugd/29c71c_ef678d4668164b36bfe3396b0b315c95.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_2326628ebacb4fd4a0472260f266ce71.pdf
    • https://static.usrfiles.com/ugd/e1d12c_a94b3e6a4e57462f9d8395300c679d68.pdf
    • https://static.usrfiles.com/ugd/d01287_8d4c6fd732c34181ad3662350d368054.pdf
    • https://static.usrfiles.com/ugd/73cb9e_29bfa53dc65743ecb76677bf1a231552.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_off00005f14.bin
1967be815713120873e6fa7991a35de5a25f238a37fdecc04b4fc2d6549f304f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F14 4868 bytes
font_01_sfnt_off00006fba.bin
4f3a0be549d98a3fa86b519a846c857bb2e4e2f057a1cc2660b01d51369877cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBA 10024 bytes

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