Malicious PDF — malware analysis report

Static analysis result for SHA-256 c049fb39d04c6d66…

MALICIOUS

PDF

49.6 KB Created: 2020-09-01 12:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3fbd8e211315f70788bfaebaf83cd51 SHA-1: 174515b7d9b58412ec4cce3bab45983296a293bb SHA-256: c049fb39d04c6d663765feb3f7a01268aa748e3ae1a1d40fd9864668b415e846
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, flagged as a link farm. One of these links, 'https://ttraff.cc/wix?keyword=mail.+ru+apk+no+ads', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on Shopify. The primary attack pattern involves luring the user to click on the malicious redirector, which likely leads to further malicious content or exploits.

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/wix?keyword=mail.+ru+apk+no+ads
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zinigezumapafukutogu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6774/3139/files/gungeon_crown_of_guns.pdf
    • https://cdn.shopify.com/s/files/1/0432/8200/6171/files/solsbury_hill_tablature.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/basta_sljezove_boje_branko_copic.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/formal_email_writing_phrases.pdf
    • https://static.usrfiles.com/ugd/a18aa6_ffdb5306d352410cbf11ed7259774545.pdf
    • https://static.usrfiles.com/ugd/e4ff69_612b41b841e2471486638626f879583e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b0c942838774af2964df5ff3177f97c.pdf
    • https://static.usrfiles.com/ugd/4b68be_6f457f4232114f2ab5dd00f95ed0c9d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a97b535424944388ee9c23b16124b08.pdf
    • https://static.usrfiles.com/ugd/b8c837_d387e0ed889c4da19f37f4ee07faba37.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064cf.bin
c53f08363c7cf9354732b9c0b2712b0e4bf40d4ca76ac88419f6d9873106e9cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CF 5056 bytes
font_01_sfnt_off0000760f.bin
cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760F 1936 bytes
font_02_sfnt_off00007f4e.bin
268b6e03ff5e1fadac6439628a3dba4d1c0f072b339127e2c3b8a021a47cbc63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4E 10512 bytes
font_03_sfnt_off0000a384.bin
271455d8e8165d605ae023e46674b4fb43a43530d825d0790d713e3adf563041		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA384 16360 bytes

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