Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5ba4a8e3d8c343…

MALICIOUS

PDF

50.4 KB Created: 2020-07-31 01:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 545ab9ff84a81ab00784cdce2031a54f SHA-1: daab3d461203a41f0e51dc2a7afba216a09c1a4b SHA-256: cb5ba4a8e3d8c343661185b892f91a739007632ce64b73adce0fcbbbd1c52711
120 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it's a malicious redirector and part of a link farm. It embeds a URL that leads to a redirector, likely to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to 'chemical methods of wastewater treatment pdf', suggesting a lure to download a document. The primary malicious IOC is the redirector URL.

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=chemical+methods+of+wastewater+treatment+pdf
    • http://files.jarryjornopublishing.com/uploads/1/3/2/7/132740541/vafawuzofepowuz.pdf
    • http://files.poeticspace.net/uploads/1/3/0/7/130739910/7749212.pdf
    • http://files.etherealsanctuary.co.uk/uploads/1/3/0/7/130775197/3734833.pdf
    • https://cdn.shopify.com/s/files/1/0435/8415/9903/files/16934452622.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/21523541440.pdf
    • https://cdn.shopify.com/s/files/1/0434/4306/0901/files/44112047434.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/rubokebaborosaradoridux.pdf
    • https://cdn.shopify.com/s/files/1/0433/4206/9918/files/32190279614.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/wumufotikiri.pdf
    • https://cdn.shopify.com/s/files/1/0430/5479/2866/files/46747802986.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46287179129.pdf
    • https://cdn.shopify.com/s/files/1/0438/0606/4801/files/vememaxoloxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2074/6906/files/julobefus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonuxifipepi.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_off00008905.bin
1792d30ca3d1a3f54c81fd6720b89fb48bdfec037172ead1fb2dafbbec8c0e0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8905 5296 bytes
font_01_sfnt_off00009ae8.bin
327f5dfa9faf8c44a6564a3a20f579d51f749ce95e50aafd79d6583fe15b2935		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE8 9688 bytes

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