Malicious PDF — malware analysis report

Static analysis result for SHA-256 961119ccb119ed71…

MALICIOUS

PDF

46.2 KB Created: 2020-08-24 12:39:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0f6a42d19651a746415df3ea738a371 SHA-1: 7e4a810bf8270894fa5ac1926402731a1cf52f3b SHA-256: 961119ccb119ed7153acf5f440d22c4e383edbff0b7dab8841477a76629548c9
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc' with a movie-related keyword. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier strongly supports the malicious nature of this PDF. The primary attack vector appears to be social engineering, directing users to a malicious URL under the guise of movie-related content.

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=cheaper+by+the+dozen+movie
    • http://savevelu.cailliemutterback.com/uploads/1/3/1/0/131070197/fufosaniwolo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31492874922.pdf
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/tokoki.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9709/files/mbps_l_g.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/difov.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/jijukefokenipejikosix.pdf
    • https://cdn.shopify.com/s/files/1/0433/9394/1671/files/romivoxe.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/ruvatiponafowiduzuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/botodegulesi.pdf
    • https://cdn.shopify.com/s/files/1/0459/9562/2559/files/libro_apocrifo_de_esdras.pdf
    • https://cdn.shopify.com/s/files/1/0432/0631/2098/files/destiny_2_tips.pdf
    • https://cdn.shopify.com/s/files/1/0437/0032/2458/files/zigunoporimuzokajetuwe.pdf
    • https://cdn.shopify.com/s/files/1/0438/3349/1606/files/liberojezemiko.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/rufawilukebodarekedad.pdf
    • https://cdn.shopify.com/s/files/1/0434/3595/0236/files/manualidades_faciles_y_bonitas_para_regalar.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_off000073d9.bin
b86f6718db8078bd13ee3c32d99a7221dee191a7f56e7010fb3a94640d403644		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D9 5244 bytes
font_01_sfnt_off0000858b.bin
73938639419accaecfca64513b814bf49dfdff5ad0419cfc8d6e7613d8846093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x858B 11456 bytes

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