Malicious PDF — malware analysis report

Static analysis result for SHA-256 488a734e4f4ba46b…

MALICIOUS

PDF

38.3 KB Created: 2020-08-19 09:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e14fb2d25675d3c48ef19d763eb8fb5 SHA-1: 49689493ce57095a272b35a8e686071debcec875 SHA-256: 488a734e4f4ba46bb07b8f424387cf1f64f4252c1cdac4b56f09150ba2ab5cc0
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to a song download and the malicious URL. The PDF also contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation to increase visibility of the malicious content. The primary malicious IOC is the redirector URL.

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.ru/pify?keyword=vande+mataram+abcd+2+song++320kbps
    • http://files.anodynesurgical.com/uploads/1/3/0/7/130739173/4583978.pdf
    • https://cdn.shopify.com/s/files/1/0436/6349/1222/files/57598078173.pdf
    • https://cdn.shopify.com/s/files/1/0435/5057/2695/files/maharashtra_state_board_11th_biology_textbook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/sonupo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6579/2929/files/51670979928.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7466/files/fasazuzezomob.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/skin_creator_for_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/munozoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/1999/files/south_west_gauteng_college_application_form_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8846/files/tidugudiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/wakudupoxesibe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5006/6339/files/riptide_uke_chords.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_off00004ec3.bin
7ee55bac71e695b5454b4b0d39d0b8c802814176bf12d4cd0e3ef1f149b76f7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC3 5968 bytes
font_01_sfnt_off000062f6.bin
0ee41ce4ddb1f071e1c6189a3e800283813c9a6e08fa45bbd8a665439ce8fa8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F6 13516 bytes

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