Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee654c20da4b27ca…

MALICIOUS

PDF

54.2 KB Created: 2020-08-03 16:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30dc4ddbc88653af52f6ce163adca698 SHA-1: 766c527363fc5185c34bb74316a3b80a7ee5fb11 SHA-256: ee654c20da4b27ca5e3592ccb0e0b09fb65c8f51ea03d6e38ad6fe5cc9129532
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though obfuscated, contains text related to Microsoft Excel, likely serving as a lure. The primary malicious URL identified is https://ttraff.com/wb?keyword=default%20worksheet%20pada%201%20file%20microsoft%20excel%202016%20adalah, which is part of a larger redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wb?keyword=default%20worksheet%20pada%201%20file%20microsoft%20excel%202016%20adalah
    • http://files.dorabramden.com/uploads/1/3/1/3/131382141/3729828.pdf
    • http://files.evadowdinternational.com/uploads/1/3/2/6/132681665/564467ae.pdf
    • http://gabiw.mindscapegallerystl.com/uploads/1/3/0/7/130739553/6705536.pdf
    • http://files.amandajeanereichert.com/uploads/1/3/1/4/131406274/b710a0.pdf
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/warima.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/fidimusipupuzap.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8133/files/jugewabewivix.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0439/files/85219787453.pdf
    • https://cdn.shopify.com/s/files/1/0433/5140/8799/files/31652681076.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3557/files/nonasedadunobezab.pdf
    • https://cdn.shopify.com/s/files/1/0434/2549/7239/files/cinderella_3_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/92289560716.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/44250265471.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.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_off00007aa0.bin
349464ddbed0106abbe3dc4719441157de47ca84495474c3b1904499532edc23
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA0 6096 bytes
font_01_sfnt_off00008f5d.bin
444f911ea8ecf07b51cbcda96ff7af96e840e143e18ea0b5ad4e2e60621e4ead
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5D 25956 bytes