Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20620a9fb91d017…

MALICIOUS

PDF

49.5 KB Created: 2020-09-01 13:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ffb38e150c4a677f25574f4d871946a SHA-1: 32aedb0b366d2e1c0450ba875530e3ea7638a8fe SHA-256: f20620a9fb91d017279748e6b378464c1de5476ac8a398a0ed8a5a4024539526
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a heuristic match for a malicious redirector link pointing to 'ttraff.ru'. It also exhibits characteristics of a link farm, embedding numerous external PDF links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking PDF filename, suggesting a lure to a potentially malicious site. No scripts were extracted from this sample.

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=graphing+derivatives+of+functions+worksheet
    • https://cdn.shopify.com/s/files/1/0432/2770/9597/files/wofixejamunamebadaxenuvo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/40939670336.pdf
    • https://cdn.shopify.com/s/files/1/0434/3064/1829/files/texitaxisafiwuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/12535131103.pdf
    • https://cdn.shopify.com/s/files/1/0431/3274/7927/files/21855906918.pdf
    • https://cdn.shopify.com/s/files/1/0432/7319/1580/files/wofuzimagip.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6682/files/citrus_county_arrest_reports.pdf
    • https://cdn.shopify.com/s/files/1/0437/7706/5121/files/fajinu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8922/2037/files/fefupebedosikoneju.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/auto_diagnosis_service_and_repair.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdf
    • https://cdn.shopify.com/s/files/1/0449/7879/8750/files/catering_services_company_profile.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_off00006ca7.bin
d65f4a327ed810d70146a2c180cdcee1a8f70bf48e44393d41c0c0f17ca560e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA7 5512 bytes
font_01_sfnt_off00007f7a.bin
8e2b1ce2031ee794fc2bcc5a65719eb1ba8d389a56b4053ac97297b62fa46311		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7A 13956 bytes
font_02_sfnt_off0000ab47.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB47 4324 bytes

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