Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3bfa3226701da3a…

MALICIOUS

PDF

43.1 KB Created: 2020-08-14 15:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ad6ce80928f603251bee4cd49ed7ae8 SHA-1: a64a568f5c3d731deb429f8c9477e832d750ee68 SHA-256: c3bfa3226701da3a8861028750a3ce34065b37582524b0ca2c8f635b68fbe23f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link disguised as an 'Answer key 2019 clerk' that redirects to malicious infrastructure at ttraff.ru. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many hosted on Shopify, to potentially obscure its malicious intent. The primary malicious IOC is the redirector URL, which is likely used to serve a secondary payload.

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=answer+key+2019+clerk
    • http://files.mumma-baby-space-online.com/uploads/1/3/1/6/131606261/e36a405730c4d6.pdf
    • https://cdn.shopify.com/s/files/1/0431/5706/1781/files/33896840971.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/up_board_maths_book_for_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/addison_wesley_math_makes_sense_6_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/natoselolani.pdf
    • https://cdn.shopify.com/s/files/1/0437/7490/2430/files/mormon_doctrine_and_covenants.pdf
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/fusobibetinomesepoxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/fanaduji.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/20862666865.pdf
    • https://cdn.shopify.com/s/files/1/0440/6801/2182/files/cambridge_english_empower_a2_descargar.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_off00005e6a.bin
a830d920a4253fea3f62e6b100b3b9598bf726be97a8f7311076c00df95e03d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6A 4864 bytes
font_01_sfnt_off00006f07.bin
599191b99cdfa0d59406ba95c49d44743a7fda82fbf31fb7b8d673dfe89f7928		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F07 10360 bytes
font_02_sfnt_off00009234.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9234 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.