Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba61e81b12ac0da9…

MALICIOUS

PDF

31.2 KB Created: 2020-09-11 22:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00dc92899fc29a6db4bbcb4b5b3de1ad SHA-1: f9e4fe0fd2b0405e93d12fe11269b59763a0c493 SHA-256: ba61e81b12ac0da92e3e786d66a9a84daf4c9466ad5701601de66e2e3efd6590
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded document body text, though heavily corrupted, contains URLs that are also present in the list of extracted URLs. The primary malicious URL is https://ttraff.me/wix?keyword=cut+song+love++tamil, which is likely used to redirect users to further malicious content. The PDF's structure and the sheer volume of links suggest an SEO poisoning or link farm attack.

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.me/wix?keyword=cut+song+love++tamil
    • http://parumab.armonklions.org/uploads/1/3/2/3/132303189/zigex.pdf
    • http://togaxowej.haapsdatters.com/uploads/1/3/0/7/130776699/5699611.pdf
    • http://voroj.stevescustomtattoos.com/uploads/1/3/1/8/131856706/84c35b2b8f.pdf
    • http://desupigu.retroca.com/uploads/1/3/0/7/130739892/7854976.pdf
    • http://files.juliannawells.com/uploads/1/3/1/6/131637881/9550118.pdf
    • https://static.usrfiles.com/ugd/b8c837_523909a8823845b3ac9006a719307e13.pdf
    • https://static.usrfiles.com/ugd/6c032c_0c96bd01bdff4241b0c89f4192469e61.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_7c4f5af114534cc79373b0ebd30ef450.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/90070562883.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/loading_screen_simulator_achievement_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/rarejoxanijenoruzomorege.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_6372feaf8043472492e129225e6e509a.pdf
    • https://static.usrfiles.com/ugd/a107db_95bf3d702fc04a25ba6d3593b2976d77.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_off00004011.bin
fff388e9e57746c502ca7987fbb5f60984e4157bb399101ebb8ecf97537390e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4011 4872 bytes
font_01_sfnt_off00005095.bin
2410ad8fa7ab46aa0445e600c720e3147a5ace863658aba460d704aaa44a5865		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5095 9328 bytes

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