Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c6a85e32af0b5c8…

MALICIOUS

PDF

42.2 KB Created: 2020-08-11 07:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5143242f1fa3f56ae6111783e6d60c9 SHA-1: fd18c62ed3956ea0dff41efde536a5170b7823f8 SHA-256: 2c6a85e32af0b5c87135bba73e547d3bf8d2f844f82e9268b93aa8ac4aa42f0c
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body also contains a call-to-action phrase, suggesting a lure to trick users into clicking the malicious link. The primary malicious URL identified is https://ttraff.ru/pify?keyword=pdf+file+format+documentation, which likely leads to further malicious content or exploits.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=pdf+file+format+documentation
    • http://files.damianduguid.com/uploads/1/3/1/1/131163666/zirokekuro_tarekajozu.pdf
    • http://files.curriculumconnection4sped.com/uploads/1/3/0/9/130969997/3ef443.pdf
    • http://files.bikemanbikerentals.com/uploads/1/3/1/8/131856797/murukerivix-lotesefasuwab.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/actual_test_listening.pdf
    • https://cdn.shopify.com/s/files/1/0448/2547/7277/files/guia_ceneval_exani_ii.pdf
    • https://cdn.shopify.com/s/files/1/0431/5932/2778/files/authoring_software.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0976/files/sabojofe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/telokawukikotenubi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3119/1975/files/71522003067.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/analyse_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/lebet.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/automated_form_filling.pdf
    • https://cdn.shopify.com/s/files/1/0440/0742/4158/files/vosopemipakulusaxedofi.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_off0000690a.bin
6a4a67090f788b413273743af6ac226ef8b3fc93fcc86f75ce4d8d3106e85c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x690A 4988 bytes
font_01_sfnt_off000079e1.bin
489ee2fe0146d551a5b3e9c673d7e55ca5af60a58a501f665f75b0a9258280b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E1 10008 bytes

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