Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e5f03e7e7dc5a8…

MALICIOUS

PDF

42.0 KB Created: 2020-08-19 01:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 574b6c6c38818e732391936f50975dae SHA-1: 80603e4f8da5ca95092299691c2f9ad743687af3 SHA-256: e0e5f03e7e7dc5a8886cbaecf61ebc0293129be66588bf0e1dda8eb564a217d9
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'allowances worksheet definition' and a URL that matches the redirector. The PDF_SEO_LINK_FARM heuristic also indicates a large number of external links, many hosted on Shopify, likely to obscure the malicious intent. 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.cc/pify?keyword=allowances+worksheet+definition
    • http://nuwixunun.nmctkd.com/uploads/1/3/1/4/131438137/5394653.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3077/files/is_pivot_animator_safe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/jurobeferilemedubejer.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/xojesanidamovilam.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/62291383704.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/86514955492.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6589/files/a1294_transistor_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/23537698112.pdf
    • https://cdn.shopify.com/s/files/1/0428/8361/2831/files/puxikesowuxom.pdf
    • https://cdn.shopify.com/s/files/1/0433/3358/2998/files/86641545710.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/moxufavoxemebinopegojivum.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_off00006654.bin
5f0b21161cc1c550483fb426673664f12eaf17c47d63966d53cd54bf9be9271f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6654 5256 bytes
font_01_sfnt_off00007833.bin
8ca5ea0d8bfa61f8fb7883ab866629c272a63bf297afe874b66f02ab1b9463d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7833 10412 bytes

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