Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa862b7759fe315…

MALICIOUS

PDF

45.2 KB Created: 2020-08-07 18:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76ae45ead12b5afe553ab2e6c9fdae02 SHA-1: e9019b5da5b4c0ed9158e586f416185f111073ea SHA-256: bfa862b7759fe3156e7c2cb2033e7517b1e71dac7e6f359bcc11597c4f26bfb3
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to benign Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the text 'Water pollution journal articles pdf' and the malicious URL, suggesting a lure to trick users into visiting the redirector. The presence of numerous links indicates a link farm or SEO poisoning attempt to drive traffic to malicious infrastructure.

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=water+pollution+journal+articles+pdf
    • http://files.d4featherston.co.nz/uploads/1/3/1/6/131636947/ritanororo.pdf
    • http://files.seeingsilence.com/uploads/1/3/1/4/131407010/ccfb43e727f.pdf
    • http://files.torydesign.com/uploads/1/3/0/7/130775462/jigola_lelezugazogog.pdf
    • http://bobar.ikaahukarchaeologyproject.com/uploads/1/3/0/8/130874431/gibovore_zuvowo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/lunujumokuxujebipejaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/76566424116.pdf
    • https://cdn.shopify.com/s/files/1/0438/6609/5781/files/purexerixivi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9988/9571/files/wijit.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/6960433764.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/niwakozekixitiwobukuduti.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9966/files/tumelagaferuvujew.pdf
    • https://cdn.shopify.com/s/files/1/0433/9829/9813/files/74482547339.pdf
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/69346994147.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/loews_hotels_careers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.pdf
    • https://cdn.shopify.com/s/files/1/0431/4326/6458/files/mepogigada.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_off00006b75.bin
7b47f6beb6e9a7d545ad149824861ee283683721ffdc0da0a543e0b6d2f8dd97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B75 5236 bytes
font_01_sfnt_off00007d65.bin
fb28195a9765643ce95f0e8e0284d5408d515682f1f9e819a0431425b6d1cb88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D65 13448 bytes

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