Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb049a24552f7f25…

MALICIOUS

PDF

37.9 KB Created: 2020-08-30 23:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31262453e3c51663dcd6df3588248877 SHA-1: e69e2fb87e4d453c64572cc9065d5139d9bb1208 SHA-256: bb049a24552f7f254644061a643b93f4de3d313654a0366a93fa355bba562ac8
162 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body text, though garbled, appears to be a lure related to 'Epic games launcher stuck on install', suggesting a social engineering pretext. The heuristic firings confirm the presence of malicious redirector links and a link farm, and also indicate instructions to disable security software, which is highly suspicious for an unsolicited document. The primary malicious IOC is the redirector URL.

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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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=epic+games+launcher+stuck+on+install
    • https://static.usrfiles.com/ugd/eb4c03_e007114900d84a5ca35a64ca8f9a0709.pdf
    • https://static.usrfiles.com/ugd/b8c837_b49899ea6ce24531be5abbcbe765ce65.pdf
    • https://static.usrfiles.com/ugd/fe83c3_4225de4477214f99aa687861b374f548.pdf
    • https://static.usrfiles.com/ugd/36f25b_0eccba4192b343db88fc62f2f1f2ba1c.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/svg_internet_explorer.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/kamiguborona.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7556/files/gabuwekunes.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/defopapigokemikumifemon.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/vadimelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/fictitious_company_names.pdf
    • https://cdn.shopify.com/s/files/1/0432/1814/1347/files/fundamental_ethical_principles.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1287/files/5690765111.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_off00005597.bin
ccc3751169ba20cdd9d0b6e8033fd671f7adf6201a186e1f578dbb456b3a04dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5597 5368 bytes
font_01_sfnt_off000067b5.bin
35caaa597e35e9e53ac8f7d8d12f3c5e9c151258774bf7f675f738b41a538223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B5 10256 bytes

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