Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f84640c14188d6d…

MALICIOUS

PDF

35.9 KB Created: 2020-08-29 01:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e671acd43fbd2852d303fd9ac5d09d63 SHA-1: 30a9fe414f6a418209cf1868f0f4aeef5884d977 SHA-256: 9f84640c14188d6d04e6e19d274900b68d0e181649bfbfb13812ba4815872f21
130 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=dragon+age+rpg+core+rulebook+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, some of which are hosted on 'static.usrfiles.com'. The presence of a 'download button' lure further supports the malicious intent of redirecting the user to a potentially harmful site.

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.com/wix?keyword=dragon+age+rpg+core+rulebook+pdf
    • https://static.usrfiles.com/ugd/b8c837_82c0bf740d0c4bbcad856d7bcbf0050f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d920c46c2f204f7398cc97e4174d14d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_efd228b7b8a34489880d51d81f03bf33.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b43aa52fe5544a390e22e3d4a170f3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c60cd8f06b924f328f848dbd3edab18d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b791972170c8475b940e8e287c149e54.pdf
    • https://static.usrfiles.com/ugd/b8c837_9083d8142d3d4032a29129d32455429d.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f9da9d239c04b9490fcdb421235720b.pdf
    • https://static.usrfiles.com/ugd/b8c837_31d6aa0e9d5543118ae26bcf2e4f5273.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2685bb0124642d180590ce27b53133b.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vunususojorimit.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/software_engineering_sommerville_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/ano_ang_panitikan.pdf
    • https://cdn.shopify.com/s/files/1/0434/8297/2326/files/53864438577.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_off00004edf.bin
3d8e5ae439ee727d54fe66e5234dbbcf522ec912a4845f066abd08885ad62202		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EDF 5348 bytes
font_01_sfnt_off00006113.bin
7eca8e4b1cd2269cbb3ecabf040eb9ef607f57abc18e19febd5fe506cea4a237		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6113 9944 bytes

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