Malicious PDF — malware analysis report

Static analysis result for SHA-256 bffa8e251e06b1eb…

MALICIOUS

PDF

39.6 KB Created: 2020-08-14 23:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b84f24f4443eb19ac4af3176f5f2073a SHA-1: d58f2473ce0ee6910c99f4566474d544cdcb2c66 SHA-256: bffa8e251e06b1eb034ee7089170e42f49bfe311014ee5304bac59938bf6129e
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, a common technique for SEO poisoning and directing users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary payload delivery mechanism. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing its role in the attack. The presence of numerous other links, many pointing to benign Shopify domains, serves to dilute the malicious intent and potentially evade detection.

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=lake+louise+snow+report
    • http://files.thewritesourcetwcspublishing.com/uploads/1/3/1/8/131856121/vumegofu.pdf
    • http://files.bethgrahamart.com/uploads/1/3/1/3/131381991/37d306292cc867.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3670/files/answer_sheet_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/advanced_excel_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/2056/5156/files/76456362949.pdf
    • https://cdn.shopify.com/s/files/1/0449/1191/9271/files/jewalemiji.pdf
    • https://cdn.shopify.com/s/files/1/0439/6960/9886/files/phoenix_wright_trials_and_tribulations_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89120683065.pdf
    • https://cdn.shopify.com/s/files/1/0434/3401/6924/files/microsoft_document_imaging_to_converter.pdf
    • https://cdn.shopify.com/s/files/1/0439/2825/6680/files/39488332497.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_off00005836.bin
b81952d54172785909fcd554cddb346b70d1645f10ec0b2fe42d149195c61399		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5836 4908 bytes
font_01_sfnt_off00006908.bin
6c07aae8043d19e7fe01bb75714e7d9f52b2600f8c844ad5f5be438f6b9edded		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6908 12992 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.