Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32bc6b34d3864be…

MALICIOUS

PDF

41.7 KB Created: 2020-08-09 16:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5063f06a8fd04669a89b383f7be20394 SHA-1: d3c26ed5ce53ce42f55af5d69e12b5df8105d9dc SHA-256: b32bc6b34d3864beb3aca98d0cf75f87a870ec63ab8b0d9498ddafd2371e0df5
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=azotemia+prerrenal+en+perros+pdf'. This indicates the document's primary purpose is to redirect the user to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted from this sample.

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=azotemia+prerrenal+en+perros+pdf
    • http://files.a1moments.com.au/uploads/1/3/1/4/131407148/f1cb1e3ca65cf3.pdf
    • http://zinid.stuart.boundlessgym.com/uploads/1/3/2/8/132814930/wonapulexovubim_garaw.pdf
    • http://files.grunthalminorhockey.com/uploads/1/3/2/6/132680901/xegenag.pdf
    • http://files.pollyreid.co.uk/uploads/1/3/0/8/130873791/1837094.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/73724826128.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4624/files/30425079440.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4981/files/28450857249.pdf
    • https://cdn.shopify.com/s/files/1/0439/9231/8110/files/ronig.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/15734438269.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakorijupomimenupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0346/1283/files/99266550954.pdf
    • https://cdn.shopify.com/s/files/1/0436/4373/2126/files/xeloxuxupap.pdf
    • https://cdn.shopify.com/s/files/1/0428/5353/1807/files/72841919182.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22584543347.pdf
    • https://cdn.shopify.com/s/files/1/0434/4607/5554/files/79051011209.pdf
    • https://cdn.shopify.com/s/files/1/0432/3429/5966/files/vukomukipiramagazufo.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_off00006471.bin
7f4af328becaebe764d04bb227946eae374bc5ca0b5bd373e5c51d764f298c71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6471 5224 bytes
font_01_sfnt_off00007625.bin
59959fd27dce928c2e231c04ef5cfbb9cbd0c3f05d84f061fd50630c30473885		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7625 10780 bytes

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