Malicious PDF — malware analysis report

Static analysis result for SHA-256 438c56f541d02976…

MALICIOUS

PDF

35.5 KB Created: 2020-08-19 15:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b252d1b361dff7a4f170e058c7a74c30 SHA-1: aa09e1a022b580ad375ab3b7de8766ea005aedc2 SHA-256: 438c56f541d02976656e3175ba1bade3e2c8658516ea37c1cef12a1a1a8c4fde
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the text 'Agriculture information network service' and the malicious URL, suggesting a lure. The presence of PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics strongly indicates a malicious intent to redirect users to harmful content.

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.com/pify?keyword=agriculture+information+network+service
    • http://files.scottsackettla.com/uploads/1/3/1/4/131453432/1c061.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7642/files/98036780681.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66923604261.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/76570390287.pdf
    • https://cdn.shopify.com/s/files/1/0435/4703/3752/files/child_development_and_pedagogy_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/base64_encode_vb._net.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/kanunadadizikekodad.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2864/files/13086094754.pdf
    • https://cdn.shopify.com/s/files/1/0430/1117/8649/files/mixiduxan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0813/1233/files/jeppesen_private_pilot_manual_download.pdf
    • http://gain.fas.usda.gov/Lists/Advanced%20Search/All
    • 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_off00004bd4.bin
56d8a418f0b1a4803fd66adac846229cd148fa3fc6f2506bce67bbce3c7adeb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD4 5404 bytes
font_01_sfnt_off00005e3b.bin
18debd5754a8712d577d647428f541a8bb2f30d6b95b678b5447d673894bd26d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3B 10332 bytes

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