Malicious PDF — malware analysis report

Static analysis result for SHA-256 353ed5ebe5016dd4…

MALICIOUS

PDF

44.7 KB Created: 2020-08-18 22:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1df1d7157e76b5e146ccf14ce8e8d02 SHA-1: 5fa308706fbde8b20c0ef7a4dc6478beb5f56552 SHA-256: 353ed5ebe5016dd46cc503ae6ea491acaf5f3d7060abf33e15fc022d51562de3
140 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. Another heuristic indicates a link farm, suggesting an attempt to manipulate search engine results or distribute content. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, and also lists numerous other PDF links, some hosted on Shopify. The presence of these links and the malicious redirector strongly suggests an attempt to lead the user to a malicious site.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=rest+api+documentation+template+ms+word
    • http://files.aoptech.org/uploads/1/3/2/6/132682303/bijuwe_duseru.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3880/files/jojizikefexuxusakuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/9472/7074/files/jedibupew.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/89969695052.pdf
    • https://cdn.shopify.com/s/files/1/0433/5350/5946/files/60366830320.pdf
    • https://cdn.shopify.com/s/files/1/0433/1634/7035/files/siwisogexiwu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/xutemofazir.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/gazigebabugan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/83219296585.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/29114690303.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_off00006a8e.bin
64c37b6d0884967d12ecd9f044d40ff42943cda9e4929035cb48210f0d12d331		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8E 5316 bytes
font_01_sfnt_off00007c9b.bin
b39857a8a257efefe41de99c2719b75a55b9994a3037306156f9fc037ebd4307		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9B 12228 bytes

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