Malicious PDF — malware analysis report

Static analysis result for SHA-256 982aa9e81bec4d14…

MALICIOUS

PDF

34.9 KB Created: 2020-08-29 13:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76e53e0f21522b9a503af2d9fa700a99 SHA-1: fe6a2c70acf333cb41c1b886a2145472141a3e1e SHA-256: 982aa9e81bec4d14ecc9ecd8369e96234e0d6419de0c4476a7b03e839693e146
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, indicating the document's primary purpose is to redirect users to potentially harmful sites. The presence of a 'PDF_SEO_LINK_FARM' heuristic suggests a tactic to artificially inflate search engine rankings or distribute malicious links. No scripts were extracted, but the embedded URLs are the primary indicators of 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.ru/wix?keyword=impedance+of+rectangular+waveguide
    • https://static.usrfiles.com/ugd/63d3ad_aeaeebcccd434f9d88b64e67785a4abb.pdf
    • https://static.usrfiles.com/ugd/b8c837_7edd44ac085d4c6fa20bd1fb0a4a616f.pdf
    • https://static.usrfiles.com/ugd/b8c837_64fdc05f990244a88cfaf2ad78b8893c.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1109/files/suvigutijejuzela.pdf
    • https://cdn.shopify.com/s/files/1/0430/3110/1603/files/hide_action_bar_android_appcompatactivity.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/detective_chinatown_2_full_movie_free.pdf
    • https://static.usrfiles.com/ugd/5b9a87_ea9200c965e849e5824b8f151aa48d8c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4596a7deb9a4e2b80d4de45785102e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_63e4e49511cc4012abeed03232ce7efb.pdf
    • https://static.usrfiles.com/ugd/b8c837_41934b2beee5442ca25610b90fd6c930.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/allure_najlepie_krsa_2011.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7123/files/66778427971.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_off00004a6c.bin
83157c99cfea6e7afc5e89b9d0216c4c20ab9fbaad21b75e92fdf28dc48c1a4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A6C 5384 bytes
font_01_sfnt_off00005cba.bin
f3ad2a9db447c4fc60eab2425d7fa0a867820278bfb7696701d2a84e606a8b6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBA 10372 bytes

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