Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2831b4f9f5c835…

MALICIOUS

PDF

42.7 KB Created: 2020-08-09 10:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a170f0b6bc315850d4ba533fdce95b52 SHA-1: ff20dc36c4a9608503a58e351b33f321fa07ce26 SHA-256: ae2831b4f9f5c8353561bc0a7be9eeab43aeba3bf91ee6b673bd1a7a41f44818
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that points to a redirector, which is likely intended to lead users to a malicious site. The presence of numerous external links, many hosted on Shopify, suggests a tactic to obscure the ultimate destination and potentially engage in SEO poisoning or a link farm attack.

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.cc/pify?keyword=new+dictionary+of+christian+apologetics+pdf
    • http://files.mashamsteamrally.com/uploads/1/3/0/8/130813841/29a89c.pdf
    • http://files.cotuithistoricalsociety.org/uploads/1/3/0/8/130813531/2156604.pdf
    • http://files.radiopigs.us/uploads/1/3/0/7/130739996/3867846.pdf
    • http://files.markjamescabinetmakers.com/uploads/1/3/0/7/130775228/e71f5246.pdf
    • http://files.clouddanceralpacas.com/uploads/1/3/1/4/131453255/269dd.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/fusidijerarumanifa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8776/files/wanudutet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/5727325415.pdf
    • https://cdn.shopify.com/s/files/1/0432/6647/4139/files/xuxoraresi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0280/4898/files/lubojizarujuxat.pdf
    • https://cdn.shopify.com/s/files/1/0429/3653/3151/files/94147769163.pdf
    • https://cdn.shopify.com/s/files/1/0429/9112/4643/files/46777574116.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/zinurawegisowosakok.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/wordly_wise_3000_book_8_lesson_9_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/4738/6262/files/66690625285.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/fafavesuruxerigemonak.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_off000066d8.bin
1bd3826efb5d8f4acfbe1f0b10be4339c9a97acec68d8ec12647722a7f204594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D8 5580 bytes
font_01_sfnt_off000079f8.bin
59e359a4944c5a926db147baf0afac0994a66af92057f97f77ec81dd793248a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F8 10324 bytes

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