Malicious PDF — malware analysis report

Static analysis result for SHA-256 af6949e4e986af4b…

MALICIOUS

PDF

46.3 KB Created: 2020-08-06 17:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae028836e41587faa53fe8b3bb62f115 SHA-1: cfddf7f6e6f6f7ad26856609d4d6ab37ae3e170e SHA-256: af6949e4e986af4b70f39f02af3f700bc091f8d043a7b5accc6ecd05fb57b470
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct attempt to lead the user to a harmful site. The 'PDF_SEO_LINK_FARM' heuristic suggests a large number of outbound links, many hosted on Shopify, which is a common tactic for SEO poisoning or distributing malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=canciones+faciles+guitarra+espa%25C3%25B1ola+pdf
    • http://files.tightenyourboots.net/uploads/1/3/1/3/131381555/pezewelurexoperutale.pdf
    • http://tulizu.shipshapetipsboatbulidingandrepairs.com/uploads/1/3/0/7/130776760/jagewogubu-zowiw-zujadezed.pdf
    • http://files.lovecyprusdogrescue.co.uk/uploads/1/3/1/4/131408465/4544249.pdf
    • https://cdn.shopify.com/s/files/1/0433/8089/9991/files/8795481696.pdf
    • https://cdn.shopify.com/s/files/1/0441/1867/1512/files/631_318_7100.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6721/files/13380959782.pdf
    • https://cdn.shopify.com/s/files/1/0436/4409/2566/files/45737284835.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/unity_fps_controller.pdf
    • https://cdn.shopify.com/s/files/1/0434/3398/4157/files/65086613191.pdf
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/zaxijiwev.pdf
    • https://cdn.shopify.com/s/files/1/0431/6774/4160/files/pejanutajobefibise.pdf
    • https://cdn.shopify.com/s/files/1/0437/0723/6503/files/83945817992.pdf
    • https://cdn.shopify.com/s/files/1/0437/8175/0941/files/pamugijotodoxib.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_off00006974.bin
06586d170c3ee3fae639351b7600ae014056e92abdb39d94c5dc5af56a94f493		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6974 5440 bytes
font_01_sfnt_off00007bb5.bin
7ef6cb6698fea806eec66effba9ae77859a8e18c03169e66e212b1421c87ab72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB5 1888 bytes
font_02_sfnt_off000084c8.bin
6ddef1d36ab533fce7b902f0d9ad867f898a998296d6f5180c196fde24f87928		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C8 11328 bytes

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