Malicious PDF — malware analysis report

Static analysis result for SHA-256 9975e9daa6ba201f…

MALICIOUS

PDF

52.3 KB Created: 2020-08-09 05:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c45c084a8349bb9efdb66a6533944054 SHA-1: 4095a93eb4f8a3f1832655b9263d4f626a5084bf SHA-256: 9975e9daa6ba201fe1b153ef8e14ab3ce4602cd1517693418acd6dd49bf01f38
150 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to the Assam TET exam syllabus and the malicious URL. This suggests the document is designed to trick users into visiting the redirector, likely leading to further malicious content or downloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=assam+tet+exam+syllabus+2020+pdf
    • http://files.writerworker.com/uploads/1/3/1/3/131380741/1925525.pdf
    • http://files.rsdtech.org/uploads/1/3/1/4/131452922/tegonuno.pdf
    • http://files.sacredvoicestudios.com/uploads/1/3/1/4/131483154/kidifobes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/roxudoropere.pdf
    • https://cdn.shopify.com/s/files/1/0435/3441/8075/files/international_curriculum_vitae_sample.pdf
    • https://cdn.shopify.com/s/files/1/0438/2323/5232/files/nisojab.pdf
    • https://cdn.shopify.com/s/files/1/0433/4744/3865/files/78224008102.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/duvomajofiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8073/files/zaxokitijijarenetuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3310/files/ropimozogonuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/rikavufumivepumivedajira.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/amazon_vision_statement.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6463/files/refazugoxikinobotenegat.pdf
    • https://cdn.shopify.com/s/files/1/0448/4536/7453/files/machines_of_loving_grace.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/jibumifaraluxufamesubi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5920/8604/files/30781107653.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/budeveluzapadozirixit.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_off000073d0.bin
eb3528102fbd450c497bd1fa54513ba8866f33cf7d74c2a70581e8eccc85e030
pdf-font-stream PDF embedded font (sfnt) at offset 0x73D0 5284 bytes
font_01_sfnt_off000085d0.bin
8d0a9147ed187a9d7a82cceffb6e140eaab439a7b85afbbc4b109e6d9982d805
pdf-font-stream PDF embedded font (sfnt) at offset 0x85D0 15488 bytes
font_02_sfnt_off0000b589.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xB589 4324 bytes