Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c85d4794132ef49…

MALICIOUS

PDF

61.6 KB Created: 2020-07-31 16:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41d4c41ee477797d09dda209c935b946 SHA-1: 64d1801c2a5c59f42ccaf560b6b2d5a1ad741361 SHA-256: 4c85d4794132ef49f165b6999f35e393ffaacc5bb6b73e765de8ca50b4cd9d1d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary URL pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates that the document is part of a link farm, likely designed to manipulate search engine results or distribute malicious content. The presence of numerous links to PDFs hosted on cdn.shopify.com and other domains suggests a broad distribution or redirection strategy. No scripts were extracted, but the document's structure and embedded links strongly indicate a malicious intent to redirect users.

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=%25D0%25B0%25D0%25BC%25D0%25B5%25D1%2580%25D0%25B8%25D0%25BA%25D0%25B0%25D0%25BD%25D1%2581%25D0%25BA%25D0%25B0%25D1%258F+%25D0%25B8%25D1%2581%25D1%2582%25D0%25BE%25D1%2580%25D0%25B8%25D1%258F+%25D1%2583%25D0%25B6%25D0%25B0%25D1%2581%25D0%25BE%25D0%25B2+7+%25D1%2581%25D0%25B5%25D0%25B7%25D0%25BE%25D0%25BD
    • http://files.dianegleimmft.com/uploads/1/3/0/7/130739012/3c11dccc49d.pdf
    • http://files.melaniedevoid.com/uploads/1/3/1/8/131872055/gefuzoge.pdf
    • http://files.kinrossmensshed.org/uploads/1/3/2/6/132695288/5da97b846.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/wejebufivuzajexebizulume.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57955619809.pdf
    • https://cdn.shopify.com/s/files/1/0430/4453/6473/files/63423060217.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/73702217871.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/wutizexu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/37818915839.pdf
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/13511533550.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/xonefevaposapiwemewoxux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duliwoledemovaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdf
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/91705687278.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/zigemopazodeluzobem.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_off00008617.bin
81ac050532d94e7185669a36f3ff091e3d30acde69c7c90874424a178e40c782		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8617 5916 bytes
font_01_sfnt_off000099e4.bin
8c15434ce1ffc1d1d9843e4c43574577dd8cb9631db975f7a14bb548d7eef513		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99E4 16656 bytes
font_02_sfnt_off0000cd21.bin
60055b2700642a032282bb2f8f9efda9bdd23821c6913cad4fb1aa8c89acbceb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD21 17036 bytes

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