Malicious PDF — malware analysis report

Static analysis result for SHA-256 a72cffc0d0dd3f48…

MALICIOUS

PDF

56.1 KB Created: 2020-08-23 07:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a73e727434b15e19929d8cb9dbe8e08c SHA-1: a2ec23b38835e0ef22904982f03401e0c7a457b5 SHA-256: a72cffc0d0dd3f48d2b9f113bafd2a369ee1e96edf7a7637626559932def7e89
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=abilify+maintena+dosage+forms'. This URL is presented within the document body, suggesting a lure related to medication dosage forms. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack pattern involves redirecting the user to a malicious site.

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/pify?keyword=abilify+maintena+dosage+forms
    • http://rujiwexav.churchbestpractices.org/uploads/1/3/0/8/130814297/7749660.pdf
    • http://neguke.contemplarichristi.com/uploads/1/3/1/3/131398109/cb748cb3.pdf
    • http://lowitoj.naturalmedicineinc.net/uploads/1/3/2/6/132695990/928b5a171.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8070/files/71869091629.pdf
    • https://cdn.shopify.com/s/files/1/0429/7739/4847/files/gojezizureworimojuzetejop.pdf
    • https://cdn.shopify.com/s/files/1/0432/9550/6592/files/71563264714.pdf
    • https://cdn.shopify.com/s/files/1/0432/5454/6594/files/diagrama_de_bimanual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6443/4583/files/fan_performance_curve.pdf
    • https://cdn.shopify.com/s/files/1/0466/3371/3829/files/28005702665.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8946/files/arihant_maths_books_for_iit_jee_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/62085908176.pdf
    • https://cdn.shopify.com/s/files/1/0430/9902/9655/files/lanidugobojuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/1210/4103/files/nuvid.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/clinical_pharmacy.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/revolemosexazenobunafami.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/
    • https://cdn.shopify.com/s/files/1/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009c78.bin
5cdc0dac3a21c693ca6d8434a5a3d8a595f8079691d5f34188089fff341d80ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C78 5460 bytes
font_01_sfnt_off0000aeec.bin
98f537445c58db73ed3b9a481359eaaccfca6868a5cc936d71af0ca0d763e76f
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEEC 10564 bytes