Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fa0559a1460f4a…

MALICIOUS

PDF

52.7 KB Created: 2020-08-18 18:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52ee31191b81aa616a60584e2b7fccb1 SHA-1: 87071a2a8b2f0ef2d405b67ec139610e7a1df34e SHA-256: a1fa0559a1460f4a4d84349329b651b30de42fe1846df6544358a45e6c124cdb
120 Risk Score

Malware Insights

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

The PDF file contains a deceptive document body masquerading as exam answers to entice users into clicking a link. This link, 'https://ttraff.cc/pify?keyword=netacad+chapter+9+exam+answers+2016', is identified as a malicious redirector. The file also exhibits characteristics of a link farm, embedding numerous external links, many of which point to PDF files hosted on Shopify. The primary malicious intent appears to be directing users to potentially harmful content through the initial redirector.

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.cc/pify?keyword=netacad+chapter+9+exam+answers+2016
    • http://files.soma-psiche.org/uploads/1/3/1/8/131871621/9fe0c28a654d6.pdf
    • http://files.pcmsbulldogs.org/uploads/1/3/0/8/130874015/4928812.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/31335106847.pdf
    • https://cdn.shopify.com/s/files/1/0435/4175/8101/files/41189766460.pdf
    • https://cdn.shopify.com/s/files/1/0431/7328/1948/files/kp_astrology_books_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/8830481397.pdf
    • https://cdn.shopify.com/s/files/1/0433/4111/9653/files/22018973644.pdf
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/php_delete_directory.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/john_deere_100_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6059/files/64878226552.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/absenteeism_research_paper.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.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_off00007936.bin
d8188176b2ef841714af5818f9859de51155f575772f60a912c19870d4b13858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7936 5676 bytes
font_01_sfnt_off00008c68.bin
d37997c07aed78b5a6cb94999f7a61f96e8c71d8d53ec57f801782e808256520		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C68 13624 bytes
font_02_sfnt_off0000b790.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB790 4324 bytes

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