Malicious PDF — malware analysis report

Static analysis result for SHA-256 56cdc1a9f2df7787…

MALICIOUS

PDF

40.6 KB Created: 2020-09-01 19:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e2f5b89abefd2c660d7ebb89b260f11 SHA-1: d9bd44c2734e6ce304e85fd977fe8a08672e93a7 SHA-256: 56cdc1a9f2df778774a1409f0d6dfb0747bf66380119e15e7a72f61a47bb9a60
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links pointing to various Shopify-hosted PDF files, suggesting a link farm for SEO poisoning. Additionally, one of the embedded links, 'https://ttraff.com/wix?keyword=url+rewrite++2.+1', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The combination of these factors suggests the document is designed to lure users through search engines or direct links to malicious infrastructure.

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/wix?keyword=url+rewrite++2.+1
    • https://cdn.shopify.com/s/files/1/0441/2683/0744/files/gewasejafutadepemisujibak.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4899/files/how_to_use_bevel_protractor.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/sijelopuvivigazarexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/90469074298.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1010/files/marxismo_definicion.pdf
    • https://static.usrfiles.com/ugd/40512e_c9da3ffab60a42629af6026233fc1efc.pdf
    • https://static.usrfiles.com/ugd/6846fe_56f365c18f554b75845b581a5950925c.pdf
    • https://static.usrfiles.com/ugd/5be868_72a76c603eab485496cc7f430e5717ca.pdf
    • https://static.usrfiles.com/ugd/8a419d_c6022c1db84749ae8df7b84cd708f3e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_be0ec9187d7547169cc924ad384d5531.pdf
    • https://static.usrfiles.com/ugd/08fe48_2f5f4d0c2e844829a9e815f7e9b4ed68.pdf
    • https://cdn.shopify.com/s/files/1/0434/1514/2551/files/73380102879.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/xifapafaj.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_off000052fa.bin
b7e7b2e70d7092d219f8c9eec23613987f0c547c8706bcafa139c6ae41b001cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52FA 4592 bytes
font_01_sfnt_off000062c5.bin
2e68d62935495209955278ed4830ebc7433178797c5f25dff928b4f24e13e14f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C5 15892 bytes

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