Malicious PDF — malware analysis report

Static analysis result for SHA-256 b753aaf3af5ffa7d…

MALICIOUS

PDF

34.6 KB Created: 2020-09-11 12:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b019ced633c2d99c9943638b24bdd4c1 SHA-1: 10e7f6499fb492ea0d752a9a021b5f53d1ea2101 SHA-256: b753aaf3af5ffa7dff04c4b87a7ec7b413b8bd7f2dc2ac3ee58885f4659f0a12
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to direct users to a malicious redirector. The primary malicious URL identified is https://ttraff.me/wix?keyword=caballo+de+troya+5+pdf+gratis. The document body, though heavily obfuscated, contains references to the malicious URL and numerous other PDF links, suggesting a social engineering lure to download content. The ML classifier strongly supports the malicious nature of this PDF.

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=caballo+de+troya+5+pdf+gratis
    • http://gimuv.martineauelectric.com/uploads/1/3/0/9/130969504/bisel.pdf
    • http://files.buckeyeevp.com/uploads/1/3/0/7/130739163/10280e15f05eae.pdf
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/ksp_action_groups.pdf
    • https://cdn.shopify.com/s/files/1/0431/3559/8758/files/sanuvuka.pdf
    • https://cdn.shopify.com/s/files/1/0434/6452/3926/files/86664082001.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4981/files/2279503757.pdf
    • https://cdn.shopify.com/s/files/1/0464/7426/4744/files/patatofubopujupozi.pdf
    • https://static.usrfiles.com/ugd/0d9a50_c573b60de0a1465582fd88e4482d38c7.pdf
    • https://static.usrfiles.com/ugd/9cb927_8430315f58cd4ffbacc6d2a16ce16132.pdf
    • https://static.usrfiles.com/ugd/15cd4d_8171e4f251a24de28dbec6b9d5db94f5.pdf
    • https://static.usrfiles.com/ugd/576447_601d1260b1c54741b2e233af795b9f08.pdf
    • https://static.usrfiles.com/ugd/733c1f_5c9c15acdee1400ab3fe11b77c2c6aa4.pdf
    • https://static.usrfiles.com/ugd/8ba634_eaf58f1bc7344c3584542cedea9548eb.pdf
    • https://static.usrfiles.com/ugd/86319b_844ddc7b61ce4cf68758e0b999ed716b.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_f28b6a6981c54bfc94502d1f84a6335a.pdf
    • https://static.usrfiles.com/ugd/98e2de_48dfaae1c5444c1794832050ce1f4ab9.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_off000045ac.bin
f1688de6cd121d3707802c77a748cd10d3a417d3640e9a7625a45a2169eab1a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45AC 5480 bytes
font_01_sfnt_off00005861.bin
d87d22a302718d5ffaebb05bd51e54960591bf2107052c7e33d2b60f59d01cc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5861 10900 bytes

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