Malicious PDF — malware analysis report

Static analysis result for SHA-256 203c51c5ed51a82c…

MALICIOUS

PDF

57.5 KB Created: 2020-08-30 02:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0f23b55bff9a78c4479d546ddc1353b SHA-1: a98c7da5fe96d75cc9441f36ca6b64e5f17184c1 SHA-256: 203c51c5ed51a82c35a47dde851d715a92bf9292a1e9438c45c1673cc45c1fd0
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, https://ttraff.com/wix?keyword=a+m%25C3%25BAsica+de+erich+zann+explica%25C3%25A7%25C3%25A3o, is identified as a malicious redirector. This suggests the document is part of a link farm designed to lure users to malicious infrastructure, likely for phishing or malware distribution.

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=a+m%25C3%25BAsica+de+erich+zann+explica%25C3%25A7%25C3%25A3o
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muzaloxebomasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3239/files/92329905396.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0181/files/57518426289.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/cookie_clicker_grimoire_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0432/1699/4461/files/93615116138.pdf
    • https://cdn.shopify.com/s/files/1/0431/6548/3172/files/55701825905.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/wunanumew.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/funabomi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/3610754483.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/airline_inventory_management.pdf
    • https://static.usrfiles.com/ugd/b8c837_0033ea4452db4d5b989bf92049294be2.pdf
    • https://static.usrfiles.com/ugd/93c935_b26519adaf384e62864ce061c549d998.pdf
    • https://static.usrfiles.com/ugd/c12414_758721a2d54d4e31906ca42c6ac4cba1.pdf
    • https://static.usrfiles.com/ugd/dd4472_a98cf723080f4d25b8175cacce9d38c4.pdf
    • https://static.usrfiles.com/ugd/d2751c_f96355ec29114ecf8bafc4c879aee0d1.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/10265276878.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/sapunalakawikorotulo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6316/4580/files/zitarimuparesibeboser.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/wowiwos.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_off00009ebe.bin
ac16bcdb8e26b94d062ce625b59000127c1a0b737bc9d319b229a6f585c8b51e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EBE 6036 bytes
font_01_sfnt_off0000b214.bin
b7c8bd50ff21d6b8ef7c31726b257cce28ee20b86be7ff4e53522d9fb2633482
pdf-font-stream PDF embedded font (sfnt) at offset 0xB214 12352 bytes