Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5cf4984862dd2c9…

MALICIOUS

PDF

56.8 KB Created: 2020-08-24 02:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aaa53a6ae5de0281a6637dfed4007a5 SHA-1: 9e9dbc1940ad069d522b5f08588c0264257dd80d SHA-256: d5cf4984862dd2c9ec3fbb02a848e6be05f865703a3098f0e44c2798037bdeb0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify-hosted PDFs, which is characteristic of a link farm. One of these links, 'https://ttraff.ru/pify?keyword=java+resttemplate+post+x-+www-+form-+urlencoded', is flagged as a malicious redirector. This suggests the document is designed to lure users to malicious infrastructure, likely for phishing or malware delivery. No scripts were extracted, and the document body was heavily obfuscated.

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=java+resttemplate+post+x-+www-+form-+urlencoded
    • http://files.expresstilef.com/uploads/1/3/1/8/131871705/tuzigubet-riwasapom-zomujejafumof-wazowilu.pdf
    • http://files.laceyandleatherexoticattirellc.com/uploads/1/3/0/7/130775033/zavikeluzujovo.pdf
    • https://cdn.shopify.com/s/files/1/0447/4834/1399/files/web_to_chrome_addon.pdf
    • https://cdn.shopify.com/s/files/1/0435/4061/1226/files/23809078740.pdf
    • https://cdn.shopify.com/s/files/1/0431/5250/7036/files/baby_driver_movie_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/sevefulabavak.pdf
    • https://cdn.shopify.com/s/files/1/0434/3595/0236/files/bidofagijunimiw.pdf
    • https://cdn.shopify.com/s/files/1/0447/8353/4229/files/31132110829.pdf
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/90307986929.pdf
    • https://cdn.shopify.com/s/files/1/0432/6395/1003/files/7164020391.pdf
    • https://cdn.shopify.com/s/files/1/0438/3657/1805/files/unity_scene_manager.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/loxidusox.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/vufosizemolo.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_off000093f2.bin
586afd1ff3547e0c1cbe1578225612adeffa91789859ea38b6199db328320024		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93F2 5540 bytes
font_01_sfnt_off0000a6d1.bin
48b878635ada7a09c93b00f40808db323143a4255e603e661d50faafe1d5928b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D1 15264 bytes

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