Malicious PDF — malware analysis report

Static analysis result for SHA-256 57589ea8821f6d6a…

MALICIOUS

PDF

41.5 KB Created: 2020-09-01 12:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8a326381e3a02cd22871c82aae13517 SHA-1: 24b2766ebf62955ff0c98748f558f830727b844b SHA-256: 57589ea8821f6d6a318dd59b5ce467552db81e009dccd11095df662f1f39ba23
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, identified as a link farm. One of these links, 'https://ttraff.ru/wix?keyword=tor+browser+windows+xp+32+bit', is flagged as a malicious redirector. The presence of a link farm and a malicious redirector strongly suggests an attempt to lure users to malicious websites, likely for phishing or malware delivery. The ML classifier also flagged this PDF with high confidence.

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=tor+browser+windows+xp+32+bit
    • https://static.usrfiles.com/ugd/822ecd_1ff668f826564d01804f9c552cf4bf68.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_60cb28ded06d4279bfc8cde845e481ac.pdf
    • https://static.usrfiles.com/ugd/0f5b72_1f1188d93f36410b945707edc5eaa44d.pdf
    • https://static.usrfiles.com/ugd/ac51ce_6e1df6a6af804806bfd168d98b1128ad.pdf
    • https://static.usrfiles.com/ugd/510a18_a7cd000624104f788661aa59660553c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4563480106644d084b80f90bbc9c2d6.pdf
    • https://static.usrfiles.com/ugd/82e28d_d25964d72ae643fe87671c801a29c7a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f959a69199c4408965e1bfad6b4f0ca.pdf
    • https://static.usrfiles.com/ugd/5e8de6_abe61fb969734b2bad7b2fa9eea7fd78.pdf
    • https://static.usrfiles.com/ugd/3e87bf_475f3ad1008c424a9299cf58b6920d15.pdf
    • https://static.usrfiles.com/ugd/270e53_d5a7f3e04c1f4009bdb303bf2bf94bf3.pdf
    • https://static.usrfiles.com/ugd/5bb01c_b23a2599437747d9b6bae9988d6790f9.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/sivegimirulitesawawus.pdf
    • https://cdn.shopify.com/s/files/1/0429/3420/6620/files/74738382662.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056d2.bin
88215d7b54b4100242b53be994cf4a17318de40cb43969c75ba01bbf55fad1dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56D2 5044 bytes
font_01_sfnt_off00006810.bin
120117ab15b0cf30ca56e624957ba449fbbbcc74213ebf1b710ee3e8083d2776		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6810 10236 bytes
font_02_sfnt_off00008b15.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B15 4324 bytes

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