Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63c67694f0ea0ed…

MALICIOUS

PDF

36.9 KB Created: 2020-08-26 01:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5b24eea2450923b381599c28158076c SHA-1: de4d912b936286a116a42c26153d0a2686d52279 SHA-256: a63c67694f0ea0ed3ad5f3940cf8fd4b06b0809c44d9b406b8e733d757469a31
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=girls+do+porn+e409'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=girls+do+porn+e409
    • http://kemuk.katsdogsllc.com/uploads/1/3/0/8/130814328/2311733.pdf
    • http://files.battlefield4.org/uploads/1/3/1/4/131407424/kejuwe.pdf
    • https://cdn.shopify.com/s/files/1/0439/1688/6184/files/jeruzotetofulu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5732/3933/files/xunujofakovilivu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/daladikuporesekedudafe.pdf
    • https://cdn.shopify.com/s/files/1/0462/2768/5525/files/fifa_world_cup_2018_schedule_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/free_abelian_group.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7206/files/wobagopiwabubevotev.pdf
    • https://cdn.shopify.com/s/files/1/0432/2879/0946/files/klasifikasi_anemia_aplastik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6482/7805/files/83405958154.pdf
    • https://cdn.shopify.com/s/files/1/0437/1021/8391/files/10155125145.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000442d.bin
74efe0cf6a1d07c36e08d30a66b65632adf6bef135031d29f026e48366dc4475		 pdf-font-stream PDF embedded font (sfnt) at offset 0x442D 4868 bytes
font_01_sfnt_off000054bf.bin
01443ff2ab7f0f40f5a2a3016873ae73e9dd39e42422f315fb67d19a169a8913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54BF 10648 bytes
font_02_sfnt_off0000791f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x791F 4324 bytes

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