Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd4ed5612c415740…

MALICIOUS

PDF

39.8 KB Created: 2020-08-19 07:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45c8387d3014f652f7362d8f629a2c0c SHA-1: add1c0c2984e331789802eff6e4cbe0f7f20acf1 SHA-256: bd4ed5612c41574079073692e8b8c3123850bde16be4339fa4391737281c6d13
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=cdisplayex+paid+apk'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=cdisplayex+paid+apk' and text suggesting a lure related to a 'paid apk', indicating a likely phishing or malware distribution attempt.

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=cdisplayex+paid+apk
    • http://files.paragon-ca.com/uploads/1/3/0/7/130739837/2544372.pdf
    • https://cdn.shopify.com/s/files/1/0446/8637/7113/files/basic_python_programming_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/5032/8486/files/acls_online_pretest_answers.pdf
    • https://cdn.shopify.com/s/files/1/0448/3655/2865/files/weather_report_hillcrest_kzn.pdf
    • https://cdn.shopify.com/s/files/1/0431/3523/8301/files/zajovadaliso.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/8630408813.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdf
    • https://cdn.shopify.com/s/files/1/0448/2465/8082/files/rupijirigazojazexab.pdf
    • https://cdn.shopify.com/s/files/1/0441/1362/5240/files/xalokumotuso.pdf
    • https://cdn.shopify.com/s/files/1/0430/5407/1957/files/az_900_exam_questions.pdf
    • https://cdn.shopify.com/s/files/1/0435/4696/8218/files/zaterab.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/gekixoponesapadopi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/refraction_of_light_class_11_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0436/7591/0294/files/savurekok.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_off00005120.bin
b539ed6a00d34a2ecf2f549ac7d27bb6bfb21cbd9b2be6cd07be392222c6b3ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5120 4604 bytes
font_01_sfnt_off000060db.bin
25f2701db507051253eff99cbd443d6b0ff110ac6f97605129f6ea0914e0e1dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DB 10344 bytes
font_02_sfnt_off00008443.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8443 4324 bytes

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