Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b6cf33bbe21573…

MALICIOUS

PDF

60.4 KB Created: 2020-08-08 07:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55df9094e45a6b0c7b9eb113fcc37c05 SHA-1: 011137318a2303c49c41f5ec1dce1a77a680746b SHA-256: c4b6cf33bbe215738e37c7023c8e216a70f0e47f8f100fe268b56393ffe91fd6
120 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 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links hosted on 'cdn.shopify.com', suggesting an attempt to distribute or obscure malicious content. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=watermark+pdf+apple', reinforcing the malicious redirector finding. The overall pattern suggests a phishing or malware delivery 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.ru/pify?keyword=watermark+pdf+apple
    • http://files.petitescholarspreschool.com/uploads/1/3/1/8/131871622/xelufarijuji-melolozu.pdf
    • http://files.pt-educationfoundation.org/uploads/1/3/1/3/131398308/dopubuliwud.pdf
    • http://files.trustonyu.com/uploads/1/3/2/3/132302872/4319045.pdf
    • http://files.legacynorthlife.com/uploads/1/3/2/6/132681460/4673800.pdf
    • http://files.upscstudymaterials.com/uploads/1/3/1/3/131383619/1522095.pdf
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/bupid.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/laporan_kasus_abortus_imminens.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/14762250913.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/xexodozomenebuxojuliviti.pdf
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/lerivut.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5829/files/baxupuzunudado.pdf
    • https://cdn.shopify.com/s/files/1/0435/1347/9320/files/gazawe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4889/3606/files/miguel_de_cervantes_don_quixote.pdf
    • https://cdn.shopify.com/s/files/1/0432/7905/7056/files/42469588069.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4231/files/historical_thinking.pdf
    • https://cdn.shopify.com/s/files/1/0433/5327/6574/files/arabic_to_urdu_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0431/5430/9280/files/10121730862.pdf
    • https://cdn.shopify.com/s/files/1/0429/8830/6586/files/anemia_ferropenica_scielo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/area_of_circles_and_semicircles_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8632/files/96781080169.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_off0000a3d1.bin
500bc3f9ca1f295a3227c9a4f00a11f73a4320d0a492d17f627142daef06c1dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D1 5088 bytes
font_01_sfnt_off0000b51f.bin
bc760db379b7a2fad374a550c64a548710e627b568136cb3e19db0006a10c2c8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB51F 15040 bytes