Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5140b1a02e1d19f…

MALICIOUS

PDF

35.0 KB Created: 2020-08-20 14:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b67d8451313402085ed739cf38e9e792 SHA-1: 8af14909799eb7c31db987fe85c81b38fc96e82e SHA-256: c5140b1a02e1d19f3c1bf5b53b921cc100418db92c2beff35a4a3fbc4241d857
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a link farm hosted on shopify.com. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. This suggests the document's primary purpose is to lure users into clicking malicious links, likely for phishing or malware distribution. No scripts were extracted from this sample.

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.com/pify?keyword=afterwards+formal+synonym
    • http://files.suzanneahmet.com/uploads/1/3/0/9/130969045/zubigavilanexejo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4053/7750/files/benefits_of_using_internet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6589/files/wuxovawageluvixugaxujiku.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/faroxebizudenugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1998/5319/files/52839412375.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70934180934.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6161/files/21157861919.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/psychological_causes_of_depression.pdf
    • https://cdn.shopify.com/s/files/1/0433/9820/1502/files/55024851718.pdf
    • https://cdn.shopify.com/s/files/1/0428/8361/2831/files/51658703538.pdf
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/metuvi.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_off00004ae5.bin
c42d6ea6312d6a75d86b8692107f88f34d5bcc370c414dce01411298b2aa147b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE5 5236 bytes
font_01_sfnt_off00005cb5.bin
4791ab26614bf60b394d3fe637d2bd02abacfee26b37cd668dc1b40a4b036b8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB5 10256 bytes

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