Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4b1b5a6622a54c…

MALICIOUS

PDF

44.6 KB Created: 2020-08-30 01:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f5962bed473afc85f0680658e76d28d SHA-1: 8eb69253550844c7b9e74e0e28aeed021825d338 SHA-256: ff4b1b5a6622a54c5dfd7bea8c1516388cc751eb9d8ce07dc2b62cdd804e85b7
140 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.ru/wix?keyword=mishkin+11th+edition+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links pointing to external PDFs, many hosted on cdn.shopify.com. The 'SE_ENABLE_LURE' heuristic indicates that the document likely instructs the user to enable macros or editing to bypass security measures. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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/wix?keyword=mishkin+11th+edition+pdf
    • https://cdn.shopify.com/s/files/1/0428/6844/1254/files/wevenukapubamum.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/pevujulofifunodajozowone.pdf
    • https://cdn.shopify.com/s/files/1/0435/3923/4967/files/70460692192.pdf
    • https://cdn.shopify.com/s/files/1/0436/6237/7113/files/wifevotewojezinujer.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_baf0ad683e6942958cc8daf56ce610c1.pdf
    • https://static.usrfiles.com/ugd/e32576_ecbb3a16473140b098e966575f498e31.pdf
    • https://static.usrfiles.com/ugd/b8c837_95797f8b807143c5af5fd41e7d5949e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_55d3f6d278d84667b42ec3c2829b52a1.pdf
    • https://static.usrfiles.com/ugd/0adedf_ebe0b08524e7471199e901563fefb139.pdf
    • https://cdn.shopify.com/s/files/1/0437/8748/5342/files/18211343777.pdf
    • https://cdn.shopify.com/s/files/1/0431/1131/7658/files/online_business_card_creator.pdf
    • https://cdn.shopify.com/s/files/1/0432/5185/9616/files/nikewalofijelidug.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/faxisegodomobilu.pdf
    • https://cdn.shopify.com/s/files/1/0447/3012/2393/files/oxford_discover_6_workbook_free_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_off00007126.bin
7f1f12a58f4b36ac3abf68a5f3e312e874d8cbb48cf847681021507595ab5574		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7126 4912 bytes
font_01_sfnt_off000081e6.bin
2d6c6ecffd2b3cc2857046ffef9666c5f4b48ddbf699bdb77fafc5e636c326a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E6 10780 bytes

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