Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8def86b01b10a6f…

MALICIOUS

PDF

37.3 KB Created: 2020-03-10 07:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 477b9449e9b701411cc583658d94c74f SHA-1: 0b22d096ad502cd5e42ea78e986936635a9fe377 SHA-256: d8def86b01b10a6f2192ed6b1f6639cfed1428e42681e20485fb398cb2ce9d14
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, all structured similarly with numeric identifiers and the '.pdf' extension, suggesting a link farm or a method to distribute malicious content. The primary URL also contains a reference to 'data structures and abstractions with java 4th edition solutions pdf', indicating a potential lure for users searching for academic materials. No scripts were extracted, and the document body is heavily obfuscated, but the sheer volume of outbound links strongly suggests a malicious intent to redirect users to potentially harmful content.

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://ttmusb.com/uploads/1/3/0/6/130604422/130604422.html#data+structures+and+abstractions+with+java+4th+edition+solutions+pdf
    • http://nbagauntlet.com/uploads/1/3/0/5/130588856/089f0fc89.pdf
    • http://aimmos.org/uploads/1/3/0/5/130588584/9360096.pdf
    • http://getfitwlucy.com/uploads/1/3/0/7/130739116/zojofipak.pdf
    • http://empoweredbirthkentucky.com/uploads/1/3/0/8/130874175/9918323.pdf
    • http://photographybyjimgaliardi.com/uploads/1/3/0/7/130776168/devozipikeza.pdf
    • http://www.freekhenkes.com/uploads/1/3/0/9/130969664/9830151.pdf
    • http://theduiskeinn.com/uploads/1/3/0/3/130323224/c084c5c7300.pdf
    • http://mittcomcreative.com/uploads/1/3/0/7/130738566/c8a00.pdf
    • http://mx.indianaturtlecare.com/uploads/1/3/0/7/130776123/vesuzafasapamud.pdf
    • http://clarksonfamilynaturopathic.com/uploads/1/3/0/8/130874239/gowesegifowamuzi.pdf
    • http://realorlando.net/uploads/1/3/0/2/130274301/7735011.pdf
    • http://www.bethanyblessing.org/uploads/1/3/0/6/130621654/nokulifum.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069eb.bin
bd9ae15b54ea4aab6d56a4de2ca851b137776b54a90948a544c298e252b2abdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69EB 7568 bytes

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