Malicious PDF — malware analysis report

Static analysis result for SHA-256 94fe176cb277de88…

MALICIOUS

PDF

58.6 KB Created: 2020-09-01 01:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79213966deda96fadc2a221b39deb069 SHA-1: caa5dd0fda4e4587cf4f8883efcb7f77f970067c SHA-256: 94fe176cb277de88eebf1c865f5c7664ba16ed74109634a17961f61675a57ac4
120 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 redirector service. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that one of the primary links leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic further suggests a large number of external links are present, likely intended to obscure the malicious destination. The document body, though partially corrupted, contains the URL that is also present in the heuristics, reinforcing the malicious redirector link as a key IOC.

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/wix?keyword=carlill+v+carbolic+smoke+ball+company+pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0579/files/xibovojitizemipaxaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/50642630595.pdf
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/29087725595.pdf
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/diversity_in_living_organisms_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3681/files/android_network_request_library.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7909/files/7139378662.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/aurobindo_ghosh_biography.pdf
    • https://static.usrfiles.com/ugd/77eba6_e9fbd3844ed645eabc80340584ecc48e.pdf
    • https://static.usrfiles.com/ugd/dd4472_ca7864767f404ed98aa5278a9d1ed977.pdf
    • https://static.usrfiles.com/ugd/45e30f_eb98906367504fdaac55fbbc1b41e561.pdf
    • https://static.usrfiles.com/ugd/b8c837_7df349b8dad545d58ed9b50e11a55cc5.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b5259121ff840b69b6ff835f871da6f.pdf
    • https://static.usrfiles.com/ugd/f1780b_85317c81c9394ee2963d812333209e6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbc1a33656694093b4b3582e9f56fbf5.pdf
    • https://static.usrfiles.com/ugd/9edd50_6ca7cd75725a4aaf992f81eed2b6eb27.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_off0000a839.bin
628bb74441a5fe9949db88a1a90504f8724d45854dd3f9ac329b991e12ba44a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA839 5572 bytes
font_01_sfnt_off0000bb20.bin
244ce7c4c4df761f6bf9186c1224fc6c70757fac539589ce3238253a8828cffd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB20 10088 bytes

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