Malicious PDF — malware analysis report

Static analysis result for SHA-256 51622398be69200c…

MALICIOUS

PDF

40.8 KB Created: 2020-08-04 04:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bf10c0d0455eefec5f79fd1ffdd1c0a SHA-1: 46a959c90327a3c869079f5c7b1b785fa72eeeae SHA-256: 51622398be69200c272737af1d1fa9688abe45ecbcfbe9aadb0bde119b150778
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm used for SEO poisoning. One of the primary links, https://ttraff.ru/pify?keyword=cctv+installation+pdf+malayalam, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'cctv installation pdf malayalam' and the malicious URL, suggesting a lure to redirect users to malicious content. 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/pify?keyword=cctv+installation+pdf+malayalam
    • http://files.electricstormecigs.com/uploads/1/3/1/8/131871651/cf4523.pdf
    • http://files.yogamuseinc.com/uploads/1/3/0/7/130739379/kuwamogubid.pdf
    • http://files.thehealthypetvet.com/uploads/1/3/1/3/131381904/vedovigezomubikap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7757/3539/files/zepasokowonofiguluda.pdf
    • https://cdn.shopify.com/s/files/1/0432/3927/6707/files/troy_bilt_xp_pressure_washer.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/35195821430.pdf
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/rikunixaram.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/xagisobekifusuposafeko.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/xixati.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/zenekalowafe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58657968950.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/sotumirakav.pdf
    • https://cdn.shopify.com/s/files/1/0438/5597/0464/files/24344859705.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/70550218034.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_off000062b1.bin
704185097d4c6eb2bda2d475d5e05fe0aea275bb2b15aec5d4e2ab63fbc80ca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B1 5272 bytes
font_01_sfnt_off000074a0.bin
3ed02883fae5a1f7cc8aab73f1727265e0f380cfb72f032879b11f0da21d1022		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A0 9948 bytes

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