Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad66f51ee42bf450…

MALICIOUS

PDF

75.8 KB Created: 2020-08-25 21:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a034062add2a66207af488c971b4c0e SHA-1: f0c2bca59d1eb57c3e9f279996e50fbb7cfd19fc SHA-256: ad66f51ee42bf45043611e6d862d959bc1cf26f5b33373531fd1f4b31b5b8b14
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and a Spanish phrase suggesting an educational lure. The presence of a PDF link farm heuristic further indicates malicious intent to distribute links. No scripts were extracted from this sample.

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.com/pify?keyword=cuaderno+de+trabajo+primer+grado+esp
    • http://files.skintwalletsusa.com/uploads/1/3/0/9/130969731/e8af4fbe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7632/9373/files/vadelutisem.pdf
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/fonunewakexavekew.pdf
    • https://cdn.shopify.com/s/files/1/0430/7828/7521/files/53728260170.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/bonarda_tomato.pdf
    • https://cdn.shopify.com/s/files/1/0431/2091/8679/files/advanced_catia_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/6502/4416/files/nordic_ware_half_sheet_pan_dimensions.pdf
    • https://cdn.shopify.com/s/files/1/0456/9946/5372/files/tunnelbear_vpn_free_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/73504487629.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/17337683933.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5671/files/xuzux.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_off0000d037.bin
6a923f99f119c4f60a47e88c3366625da5fc88a87a05e8e4d688073b2d7f7e7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD037 2872 bytes
font_01_sfnt_off0000da6b.bin
e860637a00c208584128ebb5172fd9900254100e2c24ecd51b11845c399757fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6B 5368 bytes
font_02_sfnt_off0000ec91.bin
42af3f8773ec812abafd257f5aa1b6a8c9fcde8214bfc8755c27e39a6a821d36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC91 17284 bytes

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