Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13bd4d5b1bfdd4f…

MALICIOUS

PDF

67.6 KB Created: 2020-08-29 20:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61871284c14a82916d3f9f39d38c7a96 SHA-1: 2d3178685ccfa2a08c527aca22238037a4e7fee6 SHA-256: a13bd4d5b1bfdd4fef940e67459144d3b5c73e0535f9c651a5c0ee0c1ccb1469
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised with a keyword related to downloading content. The document body, though heavily obfuscated, contains the same keyword, suggesting a social engineering lure. The presence of numerous embedded links to external PDFs, many hosted on Shopify, indicates a link farm or redirection strategy.

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/wix?keyword=lonely+planet+hawaii+download
    • https://cdn.shopify.com/s/files/1/0428/8941/2767/files/60477729124.pdf
    • https://cdn.shopify.com/s/files/1/0431/0319/1194/files/jetibuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/barujita.pdf
    • https://static.usrfiles.com/ugd/b8c837_24f40ae37c9043b6b7bc1a45d3cb2a28.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f33da28321c406381cb980a03448b05.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_3c0e66b1fb214ae585b0cb376f9e97f4.pdf
    • https://static.usrfiles.com/ugd/73f3b0_f92d73f805f840e4b10cdf0252ea39e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_65b630379da3491ab4784af37e4b5ad0.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3864/files/aeroplane_wallpaper_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27621352833.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8102/files/gapal.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/meratibemagigilokatusomu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/weather_sawyer_mi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6106/7428/files/jackson_perkins_roses.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pifafesilepobusofamut.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/
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/barujit

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdba.bin
de202253426ec527b4fc0aed558bb1a2dac054d3a33ba88a3eebf2002bae2f7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBA 4908 bytes
font_01_sfnt_off0000de7e.bin
8f602befed79485a1ea82019cc5d77da64c93440deec80e762580d2c5283f96b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7E 10172 bytes

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