Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91e84de65fef723…

MALICIOUS

PDF

42.4 KB Created: 2020-08-21 14:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9852f8819530f0f4aa274cf4107b9823 SHA-1: 6442c06acfe5ef77348ee00009e3ceaea7074c14 SHA-256: f91e84de65fef72354a0274f06e2813dc7e5835731052b7029cb2b1648fd4c94
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the text 'The dismemberment song sheet music' and a URL pointing to a redirector. This suggests the document is designed to trick users into clicking the link, which then leads to malicious infrastructure. No scripts were extracted, limiting the analysis of specific payload delivery mechanisms.

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/pify?keyword=the+dismemberment+song+sheet+music
    • http://files.bostonterriersnyc.com/uploads/1/3/1/4/131407148/2456590.pdf
    • http://verifug.janeandjohnqpublic.com/uploads/1/3/2/7/132712207/6516528.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/adobearm_entry_point_not_found.pdf
    • https://cdn.shopify.com/s/files/1/0435/0171/5622/files/youtube_dl_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0439/3543/2859/files/lagugatevojasirono.pdf
    • https://cdn.shopify.com/s/files/1/0446/1549/9939/files/enlaces_quimicos_covalentes.pdf
    • https://cdn.shopify.com/s/files/1/0437/4642/7034/files/revudimefenuwapolala.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/who_s_afraid_of_virginia_woolf_full_script.pdf
    • https://cdn.shopify.com/s/files/1/0430/4342/2361/files/31920156440.pdf
    • https://cdn.shopify.com/s/files/1/0431/8078/5821/files/one_way_anova_spss_output_interpretation.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/35063614564.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/monazodugegiloruve.pdf
    • https://cdn.shopify.com/s/files/1/0431/1764/1879/files/jisomegaferugojifafuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/2145/8853/files/pabugukava.pdf
    • https://cdn.shopify.com/s/files/1/0439/6577/6030/files/bilubabuled.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d21.bin
d8c30e17db9cbb51ad6b75a373eb7d95cb5035c46424d30c2c194789478ba9f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D21 5080 bytes
font_01_sfnt_off00005e39.bin
f6c330b95586307e32a26d3704ac97a50688656aa097fe45bcbf8c113fc5c4a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E39 14860 bytes
font_02_sfnt_off00008c7f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7F 4324 bytes