Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecae1358dc6708ef…

MALICIOUS

PDF

51.5 KB Created: 2020-08-15 13:34:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2c3691c6fd6a3646864bfaf01cad037 SHA-1: f60b1789bef18d2448006e92c655429586495c61 SHA-256: ecae1358dc6708ef20cae157809809ba204d5bbc272941dce47601fd1ecba549
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL, 'https://ttraff.cc/wb?keyword=smooth%20jazz%20piano%20sheet%20music%20free%20pdf', is likely used to direct users to further malicious content. The document body, though heavily obfuscated, contains references to the same search term, suggesting a lure for users searching for specific content. The presence of numerous links, many pointing to Shopify domains, indicates an attempt to obscure the ultimate destination and potentially leverage legitimate platforms for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wb?keyword=smooth%20jazz%20piano%20sheet%20music%20free%20pdf
    • http://files.seratrevor.com/uploads/1/3/1/4/131453539/e6c30d6f5ff.pdf
    • http://files.curtinsportsstore.com/uploads/1/3/0/7/130775363/d16a5b2ea8e6.pdf
    • http://files.kindnessmattersreflexology.ca/uploads/1/3/1/4/131410007/2043818.pdf
    • http://nakimesu.beautyescapades.com/uploads/1/3/2/3/132302780/gufibepedigapor.pdf
    • http://kulanos.lindsborgadhocroundtable.com/uploads/1/3/0/8/130814328/3532622fdeeea3.pdf
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/43910224416.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/vulivuboxoxof.pdf
    • https://cdn.shopify.com/s/files/1/0433/2643/9582/files/lubipefokezerig.pdf
    • https://cdn.shopify.com/s/files/1/0438/6239/2992/files/71612543654.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/13493413313.pdf
    • https://cdn.shopify.com/s/files/1/0440/0247/6190/files/wurofaxojobogomibunil.pdf
    • https://cdn.shopify.com/s/files/1/0440/5159/5429/files/tawowadelivogi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/bunabi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/29249854608.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/vexel_art_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0441/2866/5752/files/linked_list_all_programs_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0117/files/al_capone_does_my_shirts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000751b.bin
6b7dbdffecff569caaf5b98537cc9616dddee09a75494e18d58202e191257f67
pdf-font-stream PDF embedded font (sfnt) at offset 0x751B 5592 bytes
font_01_sfnt_off000087fb.bin
63dfbcf54b5b05401174f201137977358436e997bf158beca7993808133fee80
pdf-font-stream PDF embedded font (sfnt) at offset 0x87FB 10300 bytes
font_02_sfnt_off0000ab73.bin
d973db94ba2c448c661c26f08d051ac794e7cb4f3c7daa33c2141e8036f071b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB73 16100 bytes