Malicious PDF — malware analysis report

Static analysis result for SHA-256 8910cace040ea7d3…

MALICIOUS

PDF

48.8 KB Created: 2020-08-02 16:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5130b2f012268c1258ac59206ebc9d50 SHA-1: 254b511de342370a591e15c30bf3c9bfbfa7dba0 SHA-256: 8910cace040ea7d330677b5346d2b0f15cddc5c499a45d95eeea5f84d6fc9e0d
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to a study guide and the malicious redirector URL. The presence of multiple embedded links points towards an attempt to distribute malicious content or redirect users to phishing sites.

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=mcgraw+hill+teas+v+study+guide+pdf
    • http://files.apimm.net/uploads/1/3/0/7/130739247/5623654.pdf
    • http://files.rhondastruminger.net/uploads/1/3/1/0/131071076/1562942.pdf
    • http://files.memorialvocalmusic.com/uploads/1/3/1/4/131438313/8361378.pdf
    • http://files.stonelake.org/uploads/1/3/0/8/130874566/2720952.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/nemowejulized.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/54215982641.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65939759823.pdf
    • https://cdn.shopify.com/s/files/1/0428/6195/3191/files/mofulajes.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/nypd_exam_2016.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8986/files/17432944466.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/76077793760.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/farejubukuzejurizufi.pdf
    • https://cdn.shopify.com/s/files/1/0439/2629/0587/files/54617224216.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/77026761473.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/judevunumogofozawegirori.pdf
    • https://cdn.shopify.com/s/files/1/0433/4092/3048/files/34000575140.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/nonixagorivufuparoniv.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/
    • https://cdn.shopify.com/s/files/1/0439/2629/0587/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c47.bin
09dc96b4e6e4a7705d9b55c9d646444b09f57a01eaa6e414da1b6b5a2bae1a0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C47 5676 bytes
font_01_sfnt_off00008fc8.bin
9870490bbe9acb4a2861cb28f7f828303845a00fd4ea518e7140c0fc7b1ca198		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC8 11148 bytes

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