Malicious PDF — malware analysis report

Static analysis result for SHA-256 87aaf40c25641c51…

MALICIOUS

PDF

38.9 KB Created: 2020-07-29 19:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44e243a073c98e18d364b9b95300bb07 SHA-1: 2bea94c1ba8fcfd06d50804269f2873522677188 SHA-256: 87aaf40c25641c51af72d07d2a2f0e35cf0ec4a9e7ab8ac2e7add97eda37562f
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be related to academic exercises, suggesting a lure to disguise malicious intent. The presence of multiple embedded URLs pointing to potentially compromised Shopify domains further supports the malicious nature of the document.

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=adjectives+degrees+of+comparison+exercises+pdf
    • http://files.templebaptistchurchdq.com/uploads/1/3/0/9/130969944/buwalogi_basogosoxa_jimixidojara.pdf
    • http://files.thenaturalway.shop/uploads/1/3/2/7/132710671/7822060.pdf
    • http://files.indiachinaconjunctures.org/uploads/1/3/0/7/130776743/6763032.pdf
    • http://files.power-passion-purpose.org/uploads/1/3/0/7/130776016/kitonewifogi_vakijudojur.pdf
    • http://files.indiachinaconjunctures.org/uploads/1/3/0/7/130776743/6763032.pd
    • https://cdn.shopify.com/s/files/1/0432/3583/6072/files/89761384779.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/famafikelekawogoxomulemap.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8503/files/pagilesamolowa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6172/2788/files/jeropejabidonegabilekavis.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/jemoxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/feposatupuvowutut.pdf
    • https://cdn.shopify.com/s/files/1/0433/9902/0696/files/68542947632.pdf
    • https://cdn.shopify.com/s/files/1/0432/6742/4416/files/sununajavaketimegagil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulexukiwogefera.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/87643244018.pdf
    • https://cdn.shopify.com/s/files/1/0434/3119/8886/files/45822907076.pdf
    • https://cdn.shopify.com/s/files/1/0432/3940/7784/files/lokeledezeniwijezalevijef.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_off00005b05.bin
312a06235b3598b06de7a5af9f4856c8456c85d042fe554ed9d5a3ce09bfa153		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B05 5424 bytes
font_01_sfnt_off00006d6d.bin
35f2c3648afa51efefa0c54db5b061a673ab82868fcd07c10fd7694564ed6129		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6D 9652 bytes

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