Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c86d165a48f492…

MALICIOUS

PDF

44.0 KB Created: 2020-08-02 03:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9172aaf86413cd9cb2e84fbce55f6414 SHA-1: 2594abe93d64914e341757dbb1ff670e3b434a28 SHA-256: c9c86d165a48f4920b30178625af9b2ca8c2300bc3ca34a2c8e91da4e6163fcd
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=python+f+strings'. Another heuristic flagged the document as a PDF SEO link farm, indicating a likely attempt to manipulate search engine results or distribute malicious content through a large number of links. The presence of these link farms and the malicious redirector suggests a campaign focused on traffic redirection or phishing.

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=python+f+strings
    • http://files.sapnodesignstudio.com/uploads/1/3/2/6/132695203/259347cef4beb.pdf
    • http://files.djannalog.com/uploads/1/3/0/7/130776296/5248009.pdf
    • http://files.alfheimigs.com/uploads/1/3/0/7/130776393/tarejiledev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9921/0407/files/2062216227.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/lopam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13164506765.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/fibakowatatunolapofeke.pdf
    • https://cdn.shopify.com/s/files/1/0431/6148/5471/files/xorunodolew.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/rasegenelosamomovarorabe.pdf
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/lipitizanutufegase.pdf
    • https://cdn.shopify.com/s/files/1/0431/4778/8450/files/57970476816.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/gadusimajoxuneb.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_off00006a37.bin
1edc1919b17ad018b5e8deb5f993a3296b181f64142268832aa069adc68bbac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A37 4892 bytes
font_01_sfnt_off00007ae8.bin
dd3c878cf83e9b74c40a177c6bf90378ac02bf47097554e084b74b94baf47111		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE8 12740 bytes

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