Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc85888bde6891c4…

MALICIOUS

PDF

42.4 KB Created: 2020-08-22 17:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4a9b3c1fbf41a8bc8768891ca5bc7cd SHA-1: 84abf287dbaed6462d0983eb099d84ae6f9d26f4 SHA-256: cc85888bde6891c4e859c53e5b021026f2bf870f62bec26a96582a006a1d3ff0
140 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, disguised as an 'ACH request form'. This, combined with the heuristic indicating a callback phishing lure, suggests the document is designed to trick users into visiting a malicious site or contacting a scammer. The presence of numerous links to Shopify-hosted PDFs, while many are benign, indicates a potential SEO link farm strategy to improve search engine ranking for 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.cc/pify?keyword=automated+clearing+house%2528+ach+request+form
    • http://files.mediterranean-maudsley-forum.co.uk/uploads/1/3/1/6/131637362/5968222.pdf
    • http://files.eddielandsberg.com/uploads/1/3/0/9/130968984/fomuxakojojijaf-dafura.pdf
    • http://files.back120.com/uploads/1/3/1/8/131856161/fubelinodavini.pdf
    • http://files.ctopcustom.com/uploads/1/3/0/7/130738534/ginoju.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4485/files/66340298399.pdf
    • https://cdn.shopify.com/s/files/1/0462/6812/1237/files/excel_consolidating_data_from_multiple_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80835258875.pdf
    • https://cdn.shopify.com/s/files/1/0431/1226/7937/files/nezajonaxedoseramubas.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/97035767743.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/adrenal_gland_histology.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/zodujisifemixupoxovitira.pdf
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/60455329744.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/piano_sheet_music_jazz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/boruzufobe.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_off00006717.bin
fba273cc8c0c736c103333bc4a410e2ab41f87fe47d499a1357bc54932d824b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6717 5628 bytes
font_01_sfnt_off00007a0b.bin
aca379977ec7479388546c486ab4a33593273cf06557e50050c688d119c0fc23
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0B 10196 bytes