Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c344806cbda26c…

MALICIOUS

PDF

48.0 KB Created: 2020-08-29 11:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fd5bdd65a77503d8134204aa861d972 SHA-1: 28a18f29ddd51d67ec57bb8b2fe4e14847c93298 SHA-256: d7c344806cbda26cb812f5436af3b0e96fedeb379e54c10d3e1ffaecd7ae4084
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, 'https://ttraff.ru/wix?keyword=microstrip+antenna+technology+pdf', is presented within the document body, likely as a lure. The file also exhibits characteristics of a link farm, with numerous links pointing to benign Shopify domains, potentially for SEO manipulation or to mask the malicious activity. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is sufficient evidence of malicious intent.

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/wix?keyword=microstrip+antenna+technology+pdf
    • https://cdn.shopify.com/s/files/1/0440/5621/5702/files/nekudubofenusivizavuwoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nawujumukupuzuwoxelojoses.pdf
    • https://cdn.shopify.com/s/files/1/0433/8244/0103/files/xobiwegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6017/files/ffxi_gil_farming_2017.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/wogigikotinomagi.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8333e51fbd040d286aa09d763f6a548.pdf
    • https://static.usrfiles.com/ugd/b8c837_2dcd38eafd6a41e98a63dd022eb47498.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6bd6d7916a9421da09cf6aa5171dfc8.pdf
    • https://cdn.shopify.com/s/files/1/0429/6815/4278/files/82287777545.pdf
    • https://cdn.shopify.com/s/files/1/0433/2614/4670/files/8225664795.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_off00007e58.bin
3f1cd3cb0473f1dfc150e43b5309b378e4b3483a14a387de8df2b3521faa51e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E58 5524 bytes
font_01_sfnt_off00009122.bin
084f6c50032ab6048d772f297b6f1e6d2cc76afc71f4fc7e1232ab80dc65bfa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9122 10060 bytes

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