Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb937ec53045dc49…

MALICIOUS

PDF

46.8 KB Created: 2020-08-29 07:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a195d81cab99e742fa1addf1427f1400 SHA-1: 6be50eea0f3da11e24c867f47aa7d81ed4baaa69 SHA-256: bb937ec53045dc4905bacd40e882841b8f3ccc528d039961fe99d264635330a4
150 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link pointing to 'ttraff.com'. This link is presented within the document body, disguised as a book title, to entice users to click. The PDF also contains a large number of external links, many of which point to 'static.usrfiles.com', suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the primary malicious behavior is the redirection to a potentially harmful site.

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=captive+in+the+dark+full+book+online
    • https://static.usrfiles.com/ugd/b8c837_c42a3941ec6a42f4ada1f34b21746e93.pdf
    • https://static.usrfiles.com/ugd/b8c837_8277e1711f864ea2bf9e8915656ae08f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d58e55c4da084915a04127f1b72669aa.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/53475815207.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/98976885365.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fc9513cd8a3429c960734aaf5d32b0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_451c69a7ab8d4a5fa28f1bf65de6d96e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a61fc3bb1214983a4047278be7b03db.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c7878d63dee4cfcab60368b6ee8049e.pdf
    • https://static.usrfiles.com/ugd/b8c837_bab9f404033e4ce4b65b09eed1eab69d.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a48830810ed4c32a71d3450ff964d25.pdf
    • https://static.usrfiles.com/ugd/b8c837_15186ec41161480583a176251b50e5bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5fd8d2710d742f08e6d2a715e8ebe5e.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/
    • https://static.usrfiles.com/ugd/b8c837_7fc9513cd8

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007190.bin
e1b11895d4ee107004339b651912dcc3ca99bf24460d2c844d1af7c2a9232124		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7190 5120 bytes
font_01_sfnt_off000082ea.bin
a8e977839e8feef5bec14697be0fe9e5c2d2df0c014b40ead1194c81eee80352		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82EA 12820 bytes

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