Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30f0152a6daf6da…

MALICIOUS

PDF

43.8 KB Created: 2020-08-11 17:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f4b19e7f6feca0a7c2c2972cb0ed82b SHA-1: 9916b3393b7e5092f7e03844c978d93b6927a725 SHA-256: f30f0152a6daf6da5affaa63fb2334c5976f6fb33a0d67b4dd87bbf5d22e2b68
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.ru/pify?keyword=brain+gym+%25C3%25BCbungen+f%25C3%25BCr+erwachsene+pdf, which is presented as a link to a 'brain gym exercises' PDF. The document body is heavily obfuscated and contains embedded URLs, further supporting the malicious redirector intent.

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=brain+gym+%25C3%25BCbungen+f%25C3%25BCr+erwachsene+pdf
    • http://files.simplifycoaching.com/uploads/1/3/1/4/131406149/e2c26ea09.pdf
    • http://files.ohioadolescenthealth.org/uploads/1/3/2/7/132740905/856f4f516e034ea.pdf
    • http://files.safegrowth.org/uploads/1/3/2/3/132302872/1698222.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6939/files/2639712524.pdf
    • https://cdn.shopify.com/s/files/1/0434/1940/2397/files/fokezewiretililatiran.pdf
    • https://cdn.shopify.com/s/files/1/0431/1370/9730/files/63694632167.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/dovijivaked.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7917/files/79411281035.pdf
    • https://cdn.shopify.com/s/files/1/0438/0521/2832/files/vasedovepetekokesikaje.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/aicha_cheb_khaled.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/36942879974.pdf
    • https://cdn.shopify.com/s/files/1/0429/3951/5039/files/jorevefoja.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/tubing_bender_harbor_freight.pdf
    • https://cdn.shopify.com/s/files/1/0451/1108/3160/files/watch_batman_v_superman_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/8649/6415/files/martial_arts_pose.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/2877667136.pdf
    • https://cdn.shopify.com/s/files/1/0434/8179/2664/files/mujuxerob.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_off00006814.bin
be1885a9d75d01f409389bef930af32320dd643f2fb0858d9dde0d684e1161fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6814 6040 bytes
font_01_sfnt_off00007c57.bin
d13be50390d71905a9aa563b2b14965d20a55ea31c3ef7e36c79ef9cf9725310		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C57 10900 bytes

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