Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e21798fb3f7cb78…

MALICIOUS

PDF

42.0 KB Created: 2020-09-01 00:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bcfb6906896e0f8ae0a0d6290f2d71d SHA-1: cab183339d6c6c9616af56645d84f5f84dba656c SHA-256: 8e21798fb3f7cb7892b4760662b80fb288e59b9f6be419ca901850c6cfc869a8
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com, using a keyword related to a popular movie to entice clicks. The document also exhibits characteristics of a link farm, embedding numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's designed to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/wix?keyword=bahubali+2+film+video+song
    • https://cdn.shopify.com/s/files/1/0430/3683/5993/files/15819005182.pdf
    • https://cdn.shopify.com/s/files/1/0431/9769/4109/files/51565520581.pdf
    • https://cdn.shopify.com/s/files/1/0435/4496/9365/files/astronomy_scribd.pdf
    • https://static.usrfiles.com/ugd/5b604d_b34fa706af844a9aac9b68dfa7b9eec7.pdf
    • https://cdn.shopify.com/s/files/1/0430/5800/4117/files/cisco_anyconnect_4._6_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/credit_risk_management_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/zoremovuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/nemamegedexim.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_off0000591f.bin
67631b40159d8631483bf661cd6b99a5291686540ae729168bb731e4c7f76443		 pdf-font-stream PDF embedded font (sfnt) at offset 0x591F 5408 bytes
font_01_sfnt_off00006b65.bin
1ec4e62a54208c569cb2cd06d3f9efe70bcd04a478652710f093ebb31d3ec590		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B65 10048 bytes
font_02_sfnt_off00008dd8.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD8 4324 bytes

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