Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9af3068b5e94286…

MALICIOUS

PDF

47.4 KB Created: 2020-08-30 22:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa1524dcdc25eb79e0b57164c9bfd9d3 SHA-1: b7fc90f4b96f1436d43363b91610c0aac9731bb4 SHA-256: f9af3068b5e9428695d8baf0917e08076d4f40bcdaad4dd5b5ca108b24bf6bca
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and being part of a link farm. The primary malicious URL identified is https://ttraff.ru/wix?keyword=t%25C3%25A9l%25C3%25A9charger+%25C3%25A9pouse-moi+mon+pote, which is associated with known malicious infrastructure. The document body appears to be heavily obfuscated or corrupted, but the presence of the malicious URL is sufficient evidence of malicious intent. No scripts were extracted from this sample.

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=t%25C3%25A9l%25C3%25A9charger+%25C3%25A9pouse-moi+mon+pote
    • https://static.usrfiles.com/ugd/2f3ac6_c5eab11cc5384241a47c9462ac8224d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_89d332af4a29486188fe47c5a757534d.pdf
    • https://static.usrfiles.com/ugd/9e41f0_350eb2d572f44c229235a249f6aa6c13.pdf
    • https://static.usrfiles.com/ugd/07e02c_b319b53327ef4940aa5ff7da26502ff7.pdf
    • https://static.usrfiles.com/ugd/90423f_1bf4bcab7d394c5ead54dd01c3482184.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/41168410971.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/30423311642.pdf
    • https://cdn.shopify.com/s/files/1/0430/8441/5143/files/biochemical_reactions.pdf
    • https://static.usrfiles.com/ugd/b8c837_759fa00d1b73406ab04d855dd876ea7d.pdf
    • https://static.usrfiles.com/ugd/69695d_3cf09616a0034470989045cdeceec125.pdf
    • https://static.usrfiles.com/ugd/fef806_4ae361038e084468ba52e917c2620681.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_44737c7996114074a8d49b5eeacb5f6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c60f0e16c4c7435696cc43e21fbc263b.pdf
    • https://static.usrfiles.com/ugd/b8c837_05d5040985d642f49455785083da860d.pdf
    • https://static.usrfiles.com/ugd/b8c837_35f541860a7a4d03b64aaf45e2b94f5f.pdf
    • https://static.usrfiles.com/ugd/2e79a6_7d63f8c2e39a4a67afcb9b4588c9d7b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_6be1c08ab6f04fba8c62b1b55f411067.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005718.bin
5c5169a2f102fb0a44726795148edbaa05df3485457ef87f606de3c304e7b422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5718 5468 bytes
font_01_sfnt_off00006943.bin
d2a17bc71d77a2e34163b8cdc05aa806c813ca21d99e0a68f2f7d310c5cc39e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6943 2380 bytes
font_02_sfnt_off00007376.bin
f23959a2c4301de2c449ff2066685844f005d19d485d9935601ff60c308e04d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7376 11492 bytes
font_03_sfnt_off0000991b.bin
6aca955d4ed058af66dd3ece8b326b8275de13dce27c9c350c078ca8f421fc64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x991B 16112 bytes

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