Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd856495890a09e1…

MALICIOUS

PDF

41.0 KB Created: 2020-09-04 15:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06114ea93d6cb781ae9b7f0fa2dece3b SHA-1: 72b07afde153c8c0b17cf588649b726541f10177 SHA-256: dd856495890a09e143e1076896c36faf69ae2870113a3ba9e8dd4d7fdd7d9517
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for an 'Everfi module 5 final quiz answer key'. The primary malicious URL identified is https://ttraff.me/wix?keyword=everfi+module+5+final+quiz+answer+key, which likely serves as the initial point of compromise.

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.me/wix?keyword=everfi+module+5+final+quiz+answer+key
    • https://static.usrfiles.com/ugd/225520_591cbece61b24aad800f21af93620479.pdf
    • https://static.usrfiles.com/ugd/1be480_34f4a60192e645d183ee6a61a021365c.pdf
    • https://static.usrfiles.com/ugd/c068f8_aaa72664637f40d6a72b37f170f66f7c.pdf
    • https://static.usrfiles.com/ugd/debdc1_762d8cd7cf694b028596c7b9c5a26d6f.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_6761c66f5dad4277845d5c3373bc8c24.pdf
    • https://static.usrfiles.com/ugd/3826db_4b8ac8f7b54d4b729b78dfcf066d87fb.pdf
    • https://static.usrfiles.com/ugd/4dd980_e2433ad32f8a4c2f871df139d375477b.pdf
    • https://static.usrfiles.com/ugd/3e5d97_a36a82ab01814e639890200aaa459c4c.pdf
    • https://cdn.shopify.com/s/files/1/0435/2363/7402/files/49971142057.pdf
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/60694146856.pdf
    • https://static.usrfiles.com/ugd/b8c837_34572aa648de458f823d9caeefdf3df6.pdf
    • https://static.usrfiles.com/ugd/69a512_aeb89822bccd446789cfa900e864bdfe.pdf
    • https://static.usrfiles.com/ugd/efb3f0_8116ef4a501e45f188727dfd6bc3ab91.pdf
    • https://static.usrfiles.com/ugd/66f7a0_93642ddbe4ed4892a71cf6eeb59e5464.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_off0000617a.bin
7df8e7bfbdeca5b2afe579e005755af5b778d23138d46860e248799aa5c9d406		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617A 5628 bytes
font_01_sfnt_off000074af.bin
944830434fa1bb91ff8809e59fcf0957bc7c2e43ec701e134fde3cc35201f57c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AF 10128 bytes

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