Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4da248e398896b…

MALICIOUS

PDF

53.6 KB Created: 2020-08-14 09:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 341268370f41b91ea49f0204496e901e SHA-1: 4052c124005598c56223a276a7fce70c9646b040 SHA-256: ea4da248e398896bea5eeda30a06949b5361606a30b376f376329f773ea6dd6f
140 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=borland+c+builder+4.+5'. Additionally, it features a PDF link farm heuristic, with the first URL being 'https://cdn.shopify.com/s/files/1/0432/9730/8840/files/xanuxorinefiba.pdf'. The document body, though heavily obfuscated, contains fragments of these URLs. The presence of a callback phishing lure heuristic further suggests a social engineering attempt to trick the user into interacting with malicious 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=borland+c+builder+4.+5
    • http://kutowu.vellusandterminal.com/uploads/1/3/1/3/131383965/29c817cf5330fb.pdf
    • http://jefab.fitkitchenph.com/uploads/1/3/1/4/131454035/4458989.pdf
    • http://files.vkdistributors.co.za/uploads/1/3/1/6/131637606/vuxifedozagoso.pdf
    • http://dejawoju.stephanieflear.com/uploads/1/3/0/9/130969352/wuwujuxewovumutagid.pdf
    • https://cdn.shopify.com/s/files/1/0432/9730/8840/files/xanuxorinefiba.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1682/files/meningoencephalitis_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/download_cyder_for_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/69778279840.pdf
    • https://cdn.shopify.com/s/files/1/0431/2799/6565/files/basin_street_blues_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0436/0175/6323/files/71580810127.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/dumunopuxesa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9219/files/10205681562.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3779/files/58011085027.pdf
    • https://cdn.shopify.com/s/files/1/0433/0435/3956/files/metodo_descriptivo_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/falanoliwuxukekonikuf.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_off00008792.bin
719f39afdfe28d1fcdfb8ee123d0fa9b3a8b612453023b7ba8f65ae6c5a67e02
pdf-font-stream PDF embedded font (sfnt) at offset 0x8792 4988 bytes
font_01_sfnt_off0000988c.bin
2764a3c9039ae78a79d436f5c22b5cc8a0434f8869c79492baea8306f24d3191
pdf-font-stream PDF embedded font (sfnt) at offset 0x988C 10132 bytes
font_02_sfnt_off0000bb49.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB49 4324 bytes