Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d80b0879ac82ab…

MALICIOUS

PDF

44.2 KB Created: 2020-08-08 17:23:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59ab56a214835c7fdfc2e0bbc39e3dcb SHA-1: bad0e585b1df19171077c061c8b39fb0767ccd4c SHA-256: f8d80b0879ac82ab34ffe07d2a4c443b56a60ae9e06982a2e11018e7d5c8336e
140 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to 'https://ttraff.cc/pify?keyword=cpa+auditing+and+assurance+notes+pdf'. Additionally, a critical heuristic indicates a PDF link farm, with multiple links hosted on cdn.shopify.com. A medium heuristic suggests a callback phishing lure, consistent with the document's apparent attempt to trick users into clicking links related to 'cpa auditing and assurance notes'. No scripts were extracted from this sample.

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.cc/pify?keyword=cpa+auditing+and+assurance+notes+pdf
    • http://files.modularsinc.com/uploads/1/3/2/6/132695639/4910941.pdf
    • http://jitekazi.wiltondentist.com/uploads/1/3/0/8/130874254/8930071.pdf
    • http://files.lufkinart.com/uploads/1/3/1/4/131437516/d05ace3ca3f.pdf
    • https://cdn.shopify.com/s/files/1/0440/6539/0757/files/51635177851.pdf
    • https://cdn.shopify.com/s/files/1/0432/0428/0481/files/fobipekaridekira.pdf
    • https://cdn.shopify.com/s/files/1/0431/1996/8417/files/pikeja.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/wing_chun_kicking_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/rebewosulixis.pdf
    • https://cdn.shopify.com/s/files/1/0432/6231/2616/files/58524833928.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/kazujivexedu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/nitesimibixilibav.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/majazofuxofa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/zowunemugopuji.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/77443195037.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/24440438135.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/42584275354.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f2c.bin
2aafdc859eb049c00b3b12b3d6d9719f2d34fa0f88524a846ef046d2c01062c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2C 5196 bytes
font_01_sfnt_off000080e8.bin
73dc5ec8ff68b28fc23b2893dbf2006d1caf012d8423079cb4807df5d3aff8cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80E8 10304 bytes

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