Malicious PDF — malware analysis report

Static analysis result for SHA-256 913deb293b62c953…

MALICIOUS

PDF

45.2 KB Created: 2020-08-07 23:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9537396d8ddee3b1b215ada1acbed977 SHA-1: f90c33e187e4c3de73f896458dacf9e3ca4a3124 SHA-256: 913deb293b62c9530ae7b66bd55a882c1aa7c4b456fc1f0c1967aa07e7f07f69
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it contains links to known malicious redirector infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic fired, revealing a large number of embedded external links, many hosted on Shopify. The primary malicious URL identified is https://ttraff.ru/pify?keyword=vejiga+urinaria+anatomia+pdf. The document body contains garbled text and what appears to be metadata from wkhtmltopdf, suggesting it was programmatically generated to host these links.

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.ru/pify?keyword=vejiga+urinaria+anatomia+pdf
    • http://files.tearsofglass.ca/uploads/1/3/2/6/132682829/pudaxuromofav_gapawo.pdf
    • http://files.body-knowledge.com/uploads/1/3/2/6/132681824/2094315.pdf
    • http://files.myfutra.com/uploads/1/3/1/3/131384018/netax.pdf
    • http://files.gracevillepilates.com/uploads/1/3/1/6/131636914/wusedimib.pdf
    • https://cdn.shopify.com/s/files/1/0437/8977/9106/files/88079624487.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/espn_ncaa_basketball_scoreboard.pdf
    • https://cdn.shopify.com/s/files/1/0437/9443/2161/files/romigoja.pdf
    • https://cdn.shopify.com/s/files/1/0430/8100/7255/files/33448973184.pdf
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/maxovugumapivirisovadeta.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/81906143448.pdf
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/91071563902.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7107/files/ciencia_y_tecnologia_angel_o_demonio.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/36493712400.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/nobuto.pdf
    • https://cdn.shopify.com/s/files/1/0431/7629/6614/files/suzuki_an_125hk_2013.pdf
    • https://cdn.shopify.com/s/files/1/0435/9523/5490/files/68779550645.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_off000070fe.bin
b5cff56e50ef01cb2d70bf37e1e2eec1bc7290e2dc1f810081b71f2804173637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FE 5192 bytes
font_01_sfnt_off000082a1.bin
fe9e99cf2c6dc396450e35fb82ff107114534cdd246b6e17129b23eb017ffe2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82A1 10888 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.