Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d64bf8da6765d4…

MALICIOUS

PDF

45.0 KB Created: 2020-09-13 01:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e62259a2a8c6d1c82f09894132b4883 SHA-1: ddde2c79e0e05b6798f80a9f495f2388ad7e60f2 SHA-256: 38d64bf8da6765d46353241266e79372d66ea1ff5b772ddd8a99a8e3b530e93d
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/pify?keyword=hunter+x+core+wifi'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to lure users to malicious infrastructure. No scripts were extracted, limiting further analysis of the payload.

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.link/pify?keyword=hunter+x+core+wifi
    • http://files.psychotherapy121.org/uploads/1/3/1/0/131070633/mikurorivurari_wekalire.pdf
    • http://kuvuwit.bornadventuregear.com/uploads/1/3/0/8/130874175/0e8fdc62e.pdf
    • http://files.emotionallyfocussedeating.com/uploads/1/3/1/3/131381772/xaraxalujag_ledazowajoso.pdf
    • http://soxadad.susiegourlay.com/uploads/1/3/2/7/132710712/e7a4cd3fa1e3.pdf
    • http://files.ruggedmountaintaxidermy.com/uploads/1/3/2/6/132696154/kinumarezoda.pdf
    • http://files.petalcup.com/uploads/1/3/1/3/131398479/gebober.pdf
    • http://files.neusgilcortes.com/uploads/1/3/1/4/131406558/9812065.pdf
    • http://files.mikebernalmedia.com/uploads/1/3/1/4/131408256/faa484a.pdf
    • https://static.usrfiles.com/ugd/e80f4c_dbf3f28faa6c4ee0bd3c4237c930291f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d17a12ab3c924693bdab35d794cb1d11.pdf
    • https://static.usrfiles.com/ugd/2994dd_5ec833ac62bc4fe7af460a0895811b78.pdf
    • https://static.usrfiles.com/ugd/ce4b7c_f3c8e170936044c2a9e7c90b955c371d.pdf
    • https://static.usrfiles.com/ugd/3b6424_dfd6e036ced045aca1bef1383885a195.pdf
    • https://static.usrfiles.com/ugd/76156b_1ca2573b7d114ad093fd17d7fd6f7d12.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_e442c9f6ae744d918cafbd6dff496326.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061e3.bin
b66a5bb3d34e781645a72c99ff2d42beecac02b3d74c4cf6a849a72edb356619
pdf-font-stream PDF embedded font (sfnt) at offset 0x61E3 4460 bytes
font_01_sfnt_off00007123.bin
1857ab1084e4b34d03cc70f9ff500d9fad7cc995e72df5ef6684655372df5c03
pdf-font-stream PDF embedded font (sfnt) at offset 0x7123 11508 bytes
font_02_sfnt_off000097e1.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x97E1 4324 bytes