Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba00e2bc5e23dde…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 17:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00491919f47a9bcf39770022f79edcd2 SHA-1: d22cbae14eecf26a2e47b8a2b23e1f85c13f3c41 SHA-256: eba00e2bc5e23ddefe3ca5153783a7a2bebfcfb4b55c506eedacf969611ac190
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate that this PDF is part of a link farm, likely designed to distribute malicious content or phish users. The ML classifier also strongly flagged this sample as malicious. 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=pokemon+tower+defense+1
    • https://static.usrfiles.com/ugd/41a0b6_7db81a8b801043f0804a457ea23a073e.pdf
    • https://static.usrfiles.com/ugd/ba3095_8f4c907592a747d8a094fa7003ff8546.pdf
    • https://static.usrfiles.com/ugd/b8c837_5499244c1e324821b1d722226c25bdcf.pdf
    • https://static.usrfiles.com/ugd/e02969_eec7148ea08a4b9c9b8bacf14b901be4.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_ff5e210c6bdf4ef2ba0eb4a148acb620.pdf
    • https://static.usrfiles.com/ugd/a58b01_316a0fab9a3b4d878aaf9a4b47f8f914.pdf
    • https://static.usrfiles.com/ugd/a59130_ffd2af20b9da4185bafca67ecf73d0a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7980357f7b346768abc43f292b356c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0003321d600c4ca7967a273a0d5821d6.pdf
    • https://static.usrfiles.com/ugd/a91264_b11698bc30f8456bb6c61624b5afa234.pdf
    • https://static.usrfiles.com/ugd/105a8c_9a94c02291354e0380543bf7476a8686.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_off00006ae5.bin
95f1a56146894483c56413407bcbff9d9d755edd769237a2dcfb9b869efee233		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE5 5020 bytes
font_01_sfnt_off00007c01.bin
c7db8277aa388bcb7252845adde843949def86355bf713eedf1c48a2ffbfd3fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C01 10212 bytes

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