Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22cb07dc10c01ce…

MALICIOUS

PDF

41.2 KB Created: 2020-08-31 04:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1ab018215539dd91bec92a9659ac2c6 SHA-1: fbaf971fd8f15b0d75cf830021c4c1e35823ee43 SHA-256: b22cb07dc10c01ce839b5e2fc141be675434e0b2a01929311b9391276776b70c
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to direct users to malicious sites. One of the primary URLs, 'https://ttraff.com/wix?keyword=materiales+compuestos+reforzados+con', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the redirector and other URLs hosted on 'static.usrfiles.com', which are part of the link farm.

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.com/wix?keyword=materiales+compuestos+reforzados+con
    • https://static.usrfiles.com/ugd/0bcf16_9d4a0862744d4e8fb7f32e45fc88e7db.pdf
    • https://static.usrfiles.com/ugd/b8c837_599af717375b49ce8ebeaa38fab98f12.pdf
    • https://static.usrfiles.com/ugd/585b1d_fa88c7b73e1e41b8b953a215f96da688.pdf
    • https://static.usrfiles.com/ugd/7dd30d_6ed234f30c0d4b699d94f9ef17877850.pdf
    • https://static.usrfiles.com/ugd/6cf392_4f1720b34eaf47bb90af5762da6e7482.pdf
    • https://static.usrfiles.com/ugd/a43ec6_b1859e360fc642b3ad63c71aca72324b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8a828d5db344b34b4a16364c9714aa7.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_79d959dab7704638af159557c9b8612a.pdf
    • https://static.usrfiles.com/ugd/19103d_ca3db90936b94638a2ccc3ade3de773e.pdf
    • https://static.usrfiles.com/ugd/b8c837_abdfaaa5d78e4ba0804c53b41913ee20.pdf
    • https://static.usrfiles.com/ugd/de02f3_9edae50ba9de4e9fa43e8427e9cc45b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_931200a67fff4940b176ef1a7a5e02f0.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_off00005ca9.bin
d385a71605114e11ebf69464ea8f37bb0948703fa631a42b259590abc6661903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA9 5356 bytes
font_01_sfnt_off00006ed4.bin
d11a42b51c0e16526f45fef0792b5db0123f6818a4033f90b064c1dd247eb583		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED4 13680 bytes

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