Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb3e508253ccfc3…

MALICIOUS

PDF

41.2 KB Created: 2020-08-30 09:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba9dd86c984d426d9cbc0892629149fd SHA-1: e7f1ea33580a08e240e8f7c2898424c7b5767b68 SHA-256: ceb3e508253ccfc3bd51982260a98f1e67bfcbb3ae9c5a8ec2b636bb459d6fe8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a primary redirector URL, indicating a phishing or redirection attempt. The document body, though heavily obfuscated, contains the malicious URL and appears to be disguised as a job description template to encourage clicks. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=film+editor+job+description+template
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/sheridan_sheets_online.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0008/files/causes_and_consequences_of_ww1.pdf
    • https://cdn.shopify.com/s/files/1/0431/7485/4812/files/discord_italics_bold.pdf
    • https://cdn.shopify.com/s/files/1/0436/8970/5625/files/13939131696.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7901/files/encyclopedia_of_general_knowledge_mcqs.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9029/files/lifo_fifo_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7419/0498/files/53150004082.pdf
    • https://static.usrfiles.com/ugd/b8c837_407fb36b545b451db726156f0a55eebe.pdf
    • https://static.usrfiles.com/ugd/b8c837_13ee047d00e046cb88a652344cdcc94e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c68620902859432095bf6ea14c335038.pdf
    • https://static.usrfiles.com/ugd/97493d_edb2d35b50c64882a20b74a268042add.pdf
    • https://static.usrfiles.com/ugd/b8c837_da641bfb739c4c13890db8ffbc1f5b1d.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_off000063b9.bin
6efcdcf371195359faee136ab661fbe32a82ba2a1247cf1528d3ed29e62e96e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B9 5392 bytes
font_01_sfnt_off000075ea.bin
c8ae15e85664947e167959b0ca5dbb225ed15636190028a5d8b83cd25bdf972a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75EA 10040 bytes

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