Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac5bc84dc5e39a1…

MALICIOUS

PDF

86.4 KB Created: 2020-09-10 00:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e8d4a5ae1615a62ddd294e3d30e35ae SHA-1: 1da82857370309fb5d65d29558fafeb4e540893f SHA-256: eac5bc84dc5e39a11273ee9d708f34fc161796323f51cbb26564e90f5ead7610
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=brave+souls+apk+mod'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0446/9823/9132/files/automate_the_boring_stuff_with_python_programming_download.pdf'. The document body, though heavily obfuscated, contains the string 'brave souls apk mod', suggesting a lure for users seeking this content. The primary attack pattern involves redirecting users to malicious infrastructure.

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=brave+souls+apk+mod
    • https://cdn.shopify.com/s/files/1/0446/9823/9132/files/automate_the_boring_stuff_with_python_programming_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1191/5421/files/comreg_annual_report_2016.pdf
    • https://cdn.shopify.com/s/files/1/0432/6617/9230/files/safejigidezizurusovix.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7777/files/11117419801.pdf
    • https://cdn.shopify.com/s/files/1/0437/4023/3880/files/fidep.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5125/files/sasugilakejo.pdf
    • https://static.usrfiles.com/ugd/a58502_97735ef2816149ad89ce6177f51bcb0e.pdf
    • https://static.usrfiles.com/ugd/d3758e_811b3055caf4488ead71cf6c07e92f54.pdf
    • https://static.usrfiles.com/ugd/b1277d_786bff0c683047479701e710b4321133.pdf
    • https://static.usrfiles.com/ugd/defd8a_ea92070449b54334a653ba314241be65.pdf
    • https://static.usrfiles.com/ugd/0af078_7ecce175175a42488944455de884efcf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1633/1172/files/pdf_test_file_5mb.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/vocabulary_for_ielts_advanced_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0469/0273/9104/files/17146804443.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1323/files/kafosivowidaroginen.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/fajukaferolezovunakomuro.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e542.bin
f27c55c9b89d1e529cc334229882a994fce3c56ba814aa30be0a3b4557ddd145		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE542 5276 bytes
font_01_sfnt_off0000f719.bin
698332d1b8df33db610f9850f1fadee1d0f0319b73b40083179e7e6e9ad42fe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF719 6808 bytes
font_02_sfnt_off000108f4.bin
8b3cf37a54d37a46202fe44633d64fae6d2f76613d69ec236c1567e9ef5b77c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108F4 16872 bytes
font_03_sfnt_off000136f3.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136F3 16204 bytes

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