Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a44efcb6dc2ecf5…

MALICIOUS

PDF

44.6 KB Created: 2020-08-10 01:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac281819ef63424ce46d15fe523a67ae SHA-1: e950c811764894ca0b4b4da5c78b9479ce90bc12 SHA-256: 2a44efcb6dc2ecf55c90005d7837732f2fbea70c513dc5e908483c13fe38beb4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text "Three column cash book exercises pdf" and a URL that matches the malicious redirector. This suggests the PDF is designed to trick users into visiting malicious sites, likely for phishing or malware distribution.

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.ru/pify?keyword=three+column+cash+book+exercises+pdf
    • http://jivane.firstalternativetherapies.com/uploads/1/3/2/7/132740978/lufelevukifubopanufa.pdf
    • http://files.knoopindustries.ca/uploads/1/3/1/4/131410685/bidoruve.pdf
    • http://pikitin.goodnote.ca/uploads/1/3/0/8/130814328/kuferogo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7326/4030/files/retroarch_on_raspberry_pi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/63614141241.pdf
    • https://cdn.shopify.com/s/files/1/0433/7467/4083/files/pojanojo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7020/files/semicolon_and_colon.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/fejamujukaleganudop.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/33673342557.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/2625252224.pdf
    • https://cdn.shopify.com/s/files/1/0431/0456/7450/files/18714583818.pdf
    • https://cdn.shopify.com/s/files/1/0437/2296/5160/files/fajetamezuvazorif.pdf
    • https://cdn.shopify.com/s/files/1/0434/0783/5293/files/voxim.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/jopekakego.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_off00006f7c.bin
c5a2839436708c92ba0b81a4cd127b8682260da27b4bc134b5ebf785cd676611		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7C 5616 bytes
font_01_sfnt_off00008264.bin
8bde729e5e22d928b1995e45a6effcf0a3204a804569cdd1ce5c2401e0cc2a3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8264 10256 bytes

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