Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66f9c62edaa2a6c…

MALICIOUS

PDF

47.5 KB Created: 2020-08-11 15:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54e2610a16e456d7e01dc9eabfba3eac SHA-1: 3944a08cba656b33cbe05dae7773e53dd3b0dae7 SHA-256: c66f9c62edaa2a6c2d86f23c1cb540220d1d19775d5e4cc6715c2c5d9c67b0e7
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The document body is heavily obfuscated and contains a URL that appears to be part of a link farm or SEO manipulation scheme. The primary intent seems to be to lure users to malicious or deceptive websites through the numerous 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=simple+regression+analysis+example+pdf
    • http://files.niagaracentrendp.ca/uploads/1/3/0/7/130776518/xumori.pdf
    • http://files.hope.cr/uploads/1/3/1/3/131381706/9337376.pdf
    • http://files.michellesjohnson.com/uploads/1/3/2/6/132695546/6366908.pdf
    • http://files.palabrerapress.com/uploads/1/3/0/8/130874433/d4308cb5d7685da.pdf
    • http://files.kennetheugenepeters.com/uploads/1/3/0/8/130874400/6959958.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/77905288541.pdf
    • https://cdn.shopify.com/s/files/1/0434/3398/4161/files/nolewafozod.pdf
    • https://cdn.shopify.com/s/files/1/0430/3093/7751/files/puwivuxeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/2122/8442/files/bloodborne_bastard_of_loran.pdf
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/ap_grama_sachivalayam_category_1_syllabus_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/damulibiwexo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/leah_edelstein_keshet_mathematical_models_in_biology.pdf
    • https://cdn.shopify.com/s/files/1/0443/2130/8828/files/breadboard_how_to_use.pdf
    • https://cdn.shopify.com/s/files/1/0432/4786/1923/files/mupilabodabezi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/72754737369.pdf
    • https://cdn.shopify.com/s/files/1/0429/5730/8063/files/pearson_health_book.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_off000078b5.bin
d8fb13a55a8523b25191f84dd2fb622611c88ff393932f8c05bda1d36e57cd5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B5 5632 bytes
font_01_sfnt_off00008bcc.bin
7fd8d8e6034254d739270dc791f6edd5fa65579d2368ad092edaa497582ddf4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCC 10832 bytes

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