Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f867cf0b999e46e…

MALICIOUS

PDF

48.5 KB Created: 2020-08-29 18:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 493c7d47acf12063422f1f69f4544028 SHA-1: 8b6a6a815711a071f5ecfcfe0d1a05212b1c1d9c SHA-256: 8f867cf0b999e46ebea895c0364b555d6dca0eee6fb1806e793becc754c3f91c
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 URLs, with a critical heuristic firing indicating it's a malicious redirector link. The primary malicious URL identified is 'https://ttraff.com/wix?keyword=jquery+for+asp+net+developers+pdf+fr'. The document body, though heavily obfuscated, also contains this URL, suggesting it's a lure to direct users to potentially harmful content. The presence of a large link farm further supports the malicious intent.

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=jquery+for+asp+net+developers+pdf+fr
    • https://static.usrfiles.com/ugd/b8c837_8b11692c1a534a9e9e32563df1e0767a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2fbf2502bc746fe86a3c4dec6c5054f.pdf
    • https://static.usrfiles.com/ugd/b8c837_7337b047cace4f24a068a8c5ea9ac969.pdf
    • https://cdn.shopify.com/s/files/1/0463/3552/5025/files/bartender_designer_2016.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/chop_suey_midi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/45098932037.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e0839b1a2534d9abba6fd66bce1cfb6.pdf
    • https://static.usrfiles.com/ugd/b8c837_351a181d98fa4a3eb7301eebd9f2f107.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb5827ff099f4b069bf1397fac961bc2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9a11ba2a6934f87a27d202fa4456817.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_071b9a69dff64b78a690b2cfefba160c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0d43d1519814115b32301c81109aad9.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_off0000710e.bin
8efa9a752b6eaa8e63d3bb1627f2aebf2157835ccc2a30a73a368376971eb172		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710E 5312 bytes
font_01_sfnt_off00008341.bin
7236e7d41c27e2d8d3f5008fb3ad94105241b715082abaa2cc32a452d5f14afc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8341 16400 bytes

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