Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ebc22474f926db…

MALICIOUS

PDF

35.4 KB Created: 2020-08-08 19:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4648e9d2b46fa347596589ea89b68dc6 SHA-1: 4823510a727564e61a5e4eac961c47d3baf5fc14 SHA-256: 53ebc22474f926db9455b141ff235e20a89ebe7eb565f312fd9f8a03e614a559
120 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, but one critical link redirects to a known malicious infrastructure. This suggests the document is designed as a link farm to lure users to potentially harmful sites. The presence of a redirector URL and the sheer volume of outbound links strongly indicate a malicious intent to direct users to external, untrusted resources.

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=bosch+router+1617evspk+manual+pdf
    • http://files.saintalbansnyc.org/uploads/1/3/1/4/131453823/93c523def2.pdf
    • http://files.angiezinserphotography.com/uploads/1/3/1/6/131607866/duledelewununiper.pdf
    • http://files.maximevaporator.com/uploads/1/3/1/0/131070918/8872208.pdf
    • https://cdn.shopify.com/s/files/1/0437/6277/8264/files/pcb_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4402/0125/files/biological_oceanography.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/rizusur.pdf
    • https://cdn.shopify.com/s/files/1/0430/8520/1561/files/ignou_assignment_2020_19_solved.pdf
    • https://cdn.shopify.com/s/files/1/0430/6980/0597/files/36844855888.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/warranty_deed_with_vendor_s_lien.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunizededalusabunis.pdf
    • https://cdn.shopify.com/s/files/1/0437/7057/7045/files/35009239285.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/41036130538.pdf
    • https://cdn.shopify.com/s/files/1/0433/7647/6311/files/39064455177.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_off00004215.bin
c5e320f7ee757035a61336acaeb0dbbb95226cbefa3c593c0bf4aa818ee5a568		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4215 5852 bytes
font_01_sfnt_off000055e5.bin
97d23d076c06a271a4aa7950644d5cbca046f525543b9102b9f5e901ad35bab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55E5 13120 bytes

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