Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38bfbced615ce42…

MALICIOUS

PDF

40.9 KB Created: 2020-09-19 09:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3a9185659524f7be5adb7250bfc2382 SHA-1: e321af2441369012d1cd17abe736601a7f1df00f SHA-256: e38bfbced615ce428463cf4fcaf33bc213af962718b11a9487f5c26d66ee837b
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=graffiti+letter+alphabet'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect the user to potentially harmful content.

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=graffiti+letter+alphabet
    • https://cdn.shopify.com/s/files/1/0432/6762/1028/files/adobe_color_cc_free_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/civetta_ski_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/91087114261.pdf
    • https://47a22e15-7ba2-4a05-bb62-1d0cd3dd006d.filesusr.com/ugd/ba3095_7222883896424b668c56a43962abfaf8.pdf?index=true
    • https://95039811-e56a-4ba3-8a8f-5bf357bb56de.filesusr.com/ugd/b91392_bbf66fd02002442cb16d43bdaae29561.pdf?index=true
    • https://3f7e38bc-04ce-4369-ba33-e92d2983d680.filesusr.com/ugd/4fea5c_ff04ba155b3043c3a9ff474e41e0e1d8.pdf?index=true
    • https://afa36e3b-d0ac-4d5c-bad8-4f5a16923064.filesusr.com/ugd/2f3216_e66abe8a35174440ab0534a4ca93981e.pdf?index=true
    • https://b43afc97-492b-4acc-ad04-daabaa40d556.filesusr.com/ugd/d8966e_fb104c567c06489faaddc706227855c1.pdf?index=true
    • https://b31aa1e7-c91d-4b9d-ab8c-cef92f7ef4ab.filesusr.com/ugd/1fa6dd_02f5e28f8ae3478797aa312a64d54934.pdf?index=true
    • https://6da1af5e-4817-4377-b212-640c2bce75ab.filesusr.com/ugd/b91566_207bb53006024087bac4d6c036e37d2d.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/matchbox_20_3am.pdf
    • https://cdn.shopify.com/s/files/1/0435/9772/5864/files/29227573431.pdf
    • https://cdn.shopify.com/s/files/1/0432/4350/3783/files/84533891497.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/9850842738.pdf
    • https://cdn.shopify.com/s/files/1/0440/6883/1382/files/addictive_drums_2_vst.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_off00006331.bin
abe347d184a367c0b34b81a0c7b673f52b0ca7dcf8f453cff63ffa3e1cf31430
pdf-font-stream PDF embedded font (sfnt) at offset 0x6331 4980 bytes
font_01_sfnt_off00007418.bin
f7574b2b9cef28d36a635647a883a478120971a9196129bccfbb6d24c86e283d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7418 10196 bytes