Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d98f66a520d4041…

MALICIOUS

PDF

52.7 KB Created: 2020-08-03 12:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b9e7480f97b0660b9fbfdf9e22e9ac4 SHA-1: 128480ac0cd6cee65b73c084c35ad9cb9d723a24 SHA-256: 9d98f66a520d404151e7b65841ec805018d14e9507198ca0dd15b2628b43b6aa
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'Ayn rand anthem pdf' and the malicious URL 'https://ttraff.cc/pify?keyword=ayn+rand+anthem+pdf'. This suggests a phishing or social engineering attack aiming to redirect users to malicious content. The presence of multiple Shopify-hosted PDF links indicates a link farm strategy to obscure the ultimate destination.

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=ayn+rand+anthem+pdf
    • http://files.yogapeutics.com/uploads/1/3/1/6/131606407/xalenij.pdf
    • http://files.dceoralhistoryproject.org/uploads/1/3/1/4/131453429/jazaxeni_fizofi.pdf
    • http://files.shoparworkshopbelmont.com/uploads/1/3/2/3/132302940/bonumovafu-lovemazigabido.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/kemevidofujusej.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5991/files/wabuxojonovopuvin.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/lupafutogin.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/zevuvosatoja.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/81811475140.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/tikkun_korim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/gopaxekomivijopo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/bazeriloruke.pdf
    • https://cdn.shopify.com/s/files/1/0430/2775/9257/files/98379833824.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.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_off0000922d.bin
b8ddb0094b455b223e46e8a5f6fc1cf3475534b2ee4e90d0c41de38f33bfc8fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x922D 5164 bytes
font_01_sfnt_off0000a39f.bin
0c8f76bcb1c0a814b53ed495acd05bb80c9cc5d273a6670c88916a807d37e7f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA39F 10076 bytes

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