Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e7223f26e47f15…

MALICIOUS

PDF

49.4 KB Created: 2020-07-28 02:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 621411ed29a44301f8707525dea47b93 SHA-1: d8c2682e1dc9779d5dcbbd8523035435e77443ef SHA-256: 80e7223f26e47f15eaef06f58c9abbc88083655edeff52e2d5f9fd74250395ad
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Rdbms interview questions and answers for experienced', suggesting a lure to a phishing or scam website. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on Shopify, likely to obscure the malicious redirector.

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/pify?keyword=rdbms+interview+questions+and+answers+for+experienced
    • http://files.yogainhornsby.com/uploads/1/3/2/6/132681294/xirovunudato-solatop-wukumonip-dozazavo.pdf
    • http://files.austinarthousefilmfestival.com/uploads/1/3/0/8/130814687/e8f51490cd8a3.pdf
    • http://files.wrpthumanresources.com/uploads/1/3/1/4/131452861/lusise-zexupe.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/sigotudowavavugepura.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wajafaliwufenosikem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bizem.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2743/files/dovobikov.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/41943477241.pdf
    • https://cdn.shopify.com/s/files/1/0434/1039/1207/files/59161656757.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/23047971698.pdf
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/sefagusaja.pdf
    • https://cdn.shopify.com/s/files/1/0431/5676/6882/files/50780857268.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32686583269.pdf
    • https://cdn.shopify.com/s/files/1/0434/7668/0870/files/benigezumaxu.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_off000081c9.bin
70db90d39035631c1005f286f50fc9580cb0fae06ef5c37a4320a78689493aac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81C9 5644 bytes
font_01_sfnt_off000094f9.bin
c54af3dfa5b07c4bdf3898f77b1122845e3a667e90463311da71e00505d14ff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94F9 10288 bytes

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