Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e31ee98b3cec934…

MALICIOUS

PDF

41.5 KB Created: 2020-08-11 01:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80960ba1358bb787b1ebc636bfe547cd SHA-1: 1e238525f9e49222ac5f56cadcec19150bec6c8a SHA-256: 1e31ee98b3cec9348db3a709720dd5e643600183623a257f3f94a9475b23defc
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to suspicious domains, and one critical heuristic identified a link to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a "Struts framework book pdf". The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits.

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=struts+framework+book+pdf
    • http://faxopex.alakazamtravel.com/uploads/1/3/2/3/132303035/7556a.pdf
    • http://kufame.garyandfrancesgreen.com/uploads/1/3/0/9/130969744/63bb33b49.pdf
    • http://files.mcmillansofmalton.co.uk/uploads/1/3/1/0/131071019/9365587.pdf
    • http://files.akamitzi.com/uploads/1/3/1/1/131164355/a4af0a23.pdf
    • http://files.harkwell-labels.co.uk/uploads/1/3/1/4/131453674/971fc0c.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/godumodasif.pdf
    • https://cdn.shopify.com/s/files/1/0440/2734/7109/files/36472957257.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/toraladomokipina.pdf
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/28125946053.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67062005494.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/3583164574.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/cardiovascular_system_mcq_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugufu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5778/9593/files/regabejifigorixatom.pdf
    • https://cdn.shopify.com/s/files/1/0435/4097/1674/files/jasedodajuzibarikir.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_off0000620f.bin
499c373780f76807ac088a699a64ef8b639d0613650dcece6f800ba9db5e72c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620F 5556 bytes
font_01_sfnt_off000074e8.bin
1d12bd86df789fe2b71929a5e7590efdf3d6182895e2983628b78987e0301c67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E8 10684 bytes

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