Malicious PDF — malware analysis report

Static analysis result for SHA-256 923b7f47f97c45a1…

MALICIOUS

PDF

40.3 KB Created: 2020-08-04 22:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8a2dd767b39ed96d4ab9deb1e6041a6 SHA-1: 2fadbfb31173959f3987710da03634d6a6f638ef SHA-256: 923b7f47f97c45a1ae9a93d6f6e074079278eb40d19acb1564fd60a3ed96b0f7
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to redirect the user. No scripts were extracted, but the heuristic firings strongly indicate a malicious redirection attempt.

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.ru/pify?keyword=least+common+denominator+worksheets+pdf
    • http://files.graemation.nz/uploads/1/3/0/9/130969430/3717731.pdf
    • http://files.womancarehomemidwifery.com/uploads/1/3/1/6/131637257/jimamowuso-xetawofevowuvuv-jowobolizadof-dorokebisixaz.pdf
    • http://files.movewithlife.net/uploads/1/3/0/7/130739363/tezezilapofijix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65496272691.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/xurufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0985/1048/files/77172201489.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/gutizagakakowido.pdf
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/bupaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5816/6941/files/avast_license_key_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/24530055594.pdf
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/89448785594.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/10514748315.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97072231683.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_off00005f68.bin
5a5768dd3f8eae19a7357818222754ac86cc7192c928b2bb77885d7853186e0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F68 5460 bytes
font_01_sfnt_off000071e7.bin
169416c952f9150db0eb2a3691b994802252f35e516e80fb830f4e0756187539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E7 10100 bytes

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