Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8fdacee4bea0e1f…

MALICIOUS

PDF

52.0 KB Created: 2020-08-05 15:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 766c04537f2fd3a5d54c646804bb48bf SHA-1: f85763310ef821e5a9d67d7a00511828e5820002 SHA-256: c8fdacee4bea0e1fe203c9290cd10ce31d7de79c0681263432a09774a201001a
120 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, a technique often used for SEO poisoning or redirecting users to malicious websites. One prominent link points to 'ttraff.ru', a known malicious redirector. The document body itself is heavily obfuscated but contains references to the 'ttraff.ru' URL and other Shopify-hosted PDF files, suggesting a coordinated effort to distribute malicious content.

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/wb?keyword=discrete%20mathematics%20combinatorics%20pdf
    • http://files.yallabar.com/uploads/1/3/1/3/131382092/pugamapaz.pdf
    • http://files.lefthandedgolfaustralia.com/uploads/1/3/1/8/131856160/pemokoluge.pdf
    • http://fapojoxap.chrome57band.com/uploads/1/3/1/4/131407493/gapavam.pdf
    • http://files.qizhouxiong.com/uploads/1/3/1/6/131606408/5c08e188.pdf
    • https://cdn.shopify.com/s/files/1/0438/0894/8386/files/basketball_game_information.pdf
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/wolapepaduj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/fipuveregejoseradofaris.pdf
    • https://cdn.shopify.com/s/files/1/0436/4229/0336/files/material_ui_login.pdf
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/masuruxevelagetuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/pikuxomefumefolosatopuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1678/0951/files/1905778793.pdf
    • https://cdn.shopify.com/s/files/1/0436/6955/3305/files/jifeminagarupexosamibo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/tooling_aranda_lasch.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/gatebasebolal.pdf
    • https://cdn.shopify.com/s/files/1/0438/0504/8989/files/dej_loaf_hey_there_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/44617800261.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_off00008c96.bin
86560f307b9543c7df3c4aa41f068d1ad3bb3808202acb5c8cc2e515e9d7e325		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C96 5504 bytes
font_01_sfnt_off00009f1d.bin
0ce1fd8fda708ba09b7cb6a011e6374c64f39bab06905bf9c59440b8a5732176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F1D 10544 bytes

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