Malicious PDF — malware analysis report

Static analysis result for SHA-256 4efe21ff78bcc200…

MALICIOUS

PDF

52.6 KB Created: 2020-08-14 01:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 460b111642a69ed98fd151fdf8de2010 SHA-1: 2188882ccb1472fbc6e1d8985fd75be2762f0fbf SHA-256: 4efe21ff78bcc2005286339255bbe27feee76c6562a0ec022030362d4a0ac769
140 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=bnz.+co.+nz+app'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with a significant portion hosted on Shopify. The document body, though heavily obfuscated, contains references to 'bnz.co.nz app' and the malicious URL, suggesting a lure related to an application or service. The presence of a callback phishing lure heuristic further supports the interpretation that the document is designed to trick the user into interacting with malicious links or content.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=bnz.+co.+nz+app
    • http://files.welloiledmamadesigns.com/uploads/1/3/1/1/131163635/jolozasaru.pdf
    • http://files.shahrizzal.com/uploads/1/3/1/8/131872105/jaliluw.pdf
    • http://jesotimi.dentistrybiological.com/uploads/1/3/0/7/130738950/tipirafubomutobebax.pdf
    • http://files.joellemeristal.com/uploads/1/3/0/8/130873820/6a6dbf.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2726/files/37265303093.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/gujibavirabisaro.pdf
    • https://cdn.shopify.com/s/files/1/0437/7529/5640/files/inventions_and_inventors_list_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0439/3821/8152/files/baixar_adobe_reader_x_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/3600/8871/files/12612175103.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/47225324197.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/xapotivegibi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/20140455139.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/nutozefapusafovofimap.pdf
    • https://cdn.shopify.com/s/files/1/0433/6307/4213/files/fozanaro.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_off00006df6.bin
f4006f2d6941de46260037d40c6babd58c3fa71d15ba8f0532bd2a492ca545ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF6 4752 bytes
font_01_sfnt_off00007e3c.bin
d1df8d7e879b600ad5d0b6912ff86f11121a1d5507ab7b709093c216973d5d15
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3C 16156 bytes
font_02_sfnt_off0000b032.bin
7e0863d6dcdfe3ce59f67395a06e5e8634226e44f713773c85e494ff6d119ee1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB032 16344 bytes