Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed903d96e61c6cb9…

MALICIOUS

PDF

40.8 KB Created: 2020-08-29 04:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d72c303d758726896ab9c266ce0a1d3 SHA-1: d12a6ca3175c4f6c014603dcda79d6b33fc07115 SHA-256: ed903d96e61c6cb91bee65ce676fb52fede7e3e158dce6d394f8c4bcb4518b9f
150 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, ttraff.ru, which is likely used to distribute further malware or phishing content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM firings indicate the document's primary purpose is to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs are sufficient to determine the malicious intent.

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=vengeance+demon+hunter+macros
    • https://cdn.shopify.com/s/files/1/0434/3729/3724/files/fenewafurol.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/78813347888.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/dulavegufuwogova.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7f236eb8bf84af8bce360f1a50728c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_f67a750eb09f42be90c5b97bbff752a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_54a94d06a7ac41cfb877999f10410ccf.pdf
    • https://static.usrfiles.com/ugd/b8c837_005db2c788d544fda7811eb071a3540d.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e45d570c0464ae5b21a94a66c464f58.pdf
    • https://cdn.shopify.com/s/files/1/0464/6889/0782/files/bell_s_palsy_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/smoothie_recipes_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/givigufulejawor.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/gokupubulexixizixuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/7697/4747/files/15150697200.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/fiwijovovowivixum.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_off000055c2.bin
2b2b35ca5094e0b74b63ae7efa9fc94db3012d00167a9ffd0cc702776798a0fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55C2 5288 bytes
font_01_sfnt_off0000678d.bin
c1853cf9ec622e10141ec7964a15c6e7d74ae1f2b1966a83740eceb1b5c4e4fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x678D 15428 bytes

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