Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97bd763905af476…

MALICIOUS

PDF

38.8 KB Created: 2020-08-29 15:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9baf54b693cd62222748b1307af778e SHA-1: 9ecb21a3176241dad30f6638afaf7387cff6aa58 SHA-256: f97bd763905af4766450ec417f3301551c244448d73c4081267cf6487481874a
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that points to a redirector, which is likely used to obscure the final malicious destination. The presence of numerous external links suggests a campaign to drive traffic to potentially harmful sites.

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=the+uniform+system+of+accounts+for+r
    • https://static.usrfiles.com/ugd/b8c837_65257470cdfa4353843b286775c9c074.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b092887eafa442484de6f598e3e6a7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_d93ccf096491447aa97b0d0e689b4e90.pdf
    • https://static.usrfiles.com/ugd/b8c837_9984b42ff7c04735a62bdf43673d3922.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b8b10e1f35d4390b10e9695d15d2c22.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_25f66f9d20d6432cb305f3affdd30342.pdf
    • https://static.usrfiles.com/ugd/b8c837_79eeae42dda942149e7ae1774aa040b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_1776198c692a49ec8f3057c1e0af0eda.pdf
    • https://static.usrfiles.com/ugd/b8c837_03fc07f525374df0bcae17c46697bc14.pdf
    • https://static.usrfiles.com/ugd/b8c837_d63f25ce60ad4de588bf4f080ca682e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_55d396c04cf841308242185549265929.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e0003f6df384570a96f39d9c6e2e33e.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_off00005ab7.bin
8d096c005c02f56ba20588111859ad7f2f9402c0306c1323955badca25a4b406		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB7 5140 bytes
font_01_sfnt_off00006c0a.bin
c714aa5d98305db7c7869fc6cb7ceb38b1df58c2eb4cd13450223bb0e6f9c093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0A 10156 bytes

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