Malicious PDF — malware analysis report

Static analysis result for SHA-256 3172fa9718a0575a…

MALICIOUS

PDF

31.9 KB Created: 2020-08-19 00:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb36f8ac308e86731b6d3ff7f6137424 SHA-1: 355862de2310726875559c99e09f045ce43d0daf SHA-256: 3172fa9718a0575ab97c36b6921683d989fe451a190787626f660af6a9e8582b
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=evil+laugh+sound+effect', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content. The presence of numerous external PDF links, many hosted on shopify.com, indicates a potential SEO manipulation tactic to increase visibility and traffic to malicious sites.

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=evil+laugh+sound+effect
    • http://mekibena.eurolotto-biel.ch/uploads/1/3/1/4/131454065/16b0c46e2a9.pdf
    • http://pawolosoz.ileanaespejel.com/uploads/1/3/1/0/131070109/6005571.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/kibulewikemutovarokuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/pibaki.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1879/files/oxford_english_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/4393/0791/files/taseletarosixubafepof.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/foxpdf_coreldraw_cdr_to_converter.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/the_heart_manual_bm_hegde.pdf
    • https://cdn.shopify.com/s/files/1/0432/9367/1588/files/26441349231.pdf
    • https://cdn.shopify.com/s/files/1/0437/7985/0397/files/40964659465.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/2477433408.pdf
    • https://cdn.shopify.com/s/files/1/0430/0324/8803/files/dubai_map_download.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_off00004134.bin
901a94eb1f8b9c4af61055e1691aa1485b36787a8d80381b15119f931fd0c984		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4134 5204 bytes
font_01_sfnt_off000052e8.bin
6aea9b2409f6ae3e08ac629de80a02542928b8d346e45fd7f8b3e6f64ba77a23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52E8 9428 bytes

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