Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d082101f85b4b9…

MALICIOUS

PDF

70.6 KB Created: 2020-09-02 13:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 844af28d57af4f9337d5e598ab5a3fdb SHA-1: cb25546964a9efee2263874b252e65c3f3ba96ea SHA-256: 99d082101f85b4b91bf3c39a6e13f4ef2bc4f09f7768fc44cde3bcf0b643608d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=latest+software+for+iphone+4s+free', is designed to lure users with promises of free software. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. No scripts were extracted from this sample.

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.link/wix?keyword=latest+software+for+iphone+4s+free
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/introduction_to_chemistry_nivaldo_j_tro.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/74610019006.pdf
    • https://cdn.shopify.com/s/files/1/0431/0931/8813/files/39768853339.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/gifepi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/71116237449.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/nufurovug.pdf
    • https://cdn.shopify.com/s/files/1/0429/0386/3459/files/22241485954.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4742/files/9281405416.pdf
    • https://cdn.shopify.com/s/files/1/0437/2935/4903/files/kexasuzuritibebi.pdf
    • https://static.usrfiles.com/ugd/de65f7_4c25758bf0e2434987761fafda3af72a.pdf
    • https://static.usrfiles.com/ugd/599f1c_8f9cb2ad7c22456da44e86cdd2ab9f66.pdf
    • https://static.usrfiles.com/ugd/22739b_98c2ef948b01485b9bffe129302fc83a.pdf
    • https://static.usrfiles.com/ugd/b8c837_82ca98d220124fa3a1cbac718eb95ff2.pdf
    • https://static.usrfiles.com/ugd/cfa91a_54c2cb2405f04afb989915b11df497a0.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_off0000d0aa.bin
973074a3b14a0b503dd1c9a6693b905cb95da8c270a44150b5b117e586e97972		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AA 5080 bytes
font_01_sfnt_off0000e20d.bin
0248df68ab85e23707e74db37ae2ab17543ffe8f471692d4b4799baafd3cbfbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE20D 13692 bytes

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