Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9c5f333cf91f8a…

MALICIOUS

PDF

45.8 KB Created: 2020-09-01 00:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 430155fd9e7f63bf2a2f9ec9b978400c SHA-1: c299e5a0ecddf7069940cadb297e6540f5313f18 SHA-256: ce9c5f333cf91f8a9aa4c33f1ca28d689da0b7a3627b2c1e4d4afe8d8dba2ee7
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as educational content, but the primary URL leads to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=arrhenius+equation+practice+questions+and+answers', which is flagged as malicious. This suggests the document's purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution.

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.com/wix?keyword=arrhenius+equation+practice+questions+and+answers
    • https://static.usrfiles.com/ugd/89363e_c84eeebe11cd4c0ba76b762446e877d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_54b7dcf7a2be4aa09672ee1cf0f27ae1.pdf
    • https://static.usrfiles.com/ugd/a86d68_e37ec50189194718a5679bf4a7519dff.pdf
    • https://cdn.shopify.com/s/files/1/0434/8982/0836/files/87181570969.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/et_reporter_news_amharic.pdf
    • https://cdn.shopify.com/s/files/1/0437/8961/5266/files/74709344336.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/61291597072.pdf
    • https://cdn.shopify.com/s/files/1/0454/6841/8206/files/exponents_with_negative_bases.pdf
    • https://static.usrfiles.com/ugd/b8c837_68ddddd5a1754db5928c765591c206e2.pdf
    • https://static.usrfiles.com/ugd/ca300b_763d19419e0c4de8b2899d17445f2b99.pdf
    • https://cdn.shopify.com/s/files/1/0434/6619/5106/files/35476370942.pdf
    • https://cdn.shopify.com/s/files/1/0437/0356/6486/files/dovogebigafalewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3210/1543/files/95134599791.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000667d.bin
34682b9a22e91d8755657dfcc26cf4037a9c1575cc730d8f50beb134541188d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667D 5220 bytes
font_01_sfnt_off00007837.bin
e4e9162e40fdee70d2366624152bdd1094a0cd22cce2ad68eac45bc5fc4d4b0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7837 10488 bytes
font_02_sfnt_off00009be5.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE5 4324 bytes

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