Malicious PDF — malware analysis report

Static analysis result for SHA-256 b38f8a3556dbfccb…

MALICIOUS

PDF

40.3 KB Created: 2020-08-29 17:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9afebc719b73202b1c9c5a16615bc988 SHA-1: f4faf1598a0543a2bf3e2efb58db3d0724fcb61a SHA-256: b38f8a3556dbfccbd03071d434cf12d820b7442bc781b3f9f71c879962dc24ec
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'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on Shopify. The document body and embedded artifacts are heavily obfuscated, but the primary malicious intent appears to be redirecting users to the 'ttraff.com' URL, likely for further malicious activity.

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/wix?keyword=1000+bible+verses+to+memorize
    • https://cdn.shopify.com/s/files/1/0440/0077/2254/files/automobile_engineering_text_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/5565/0718/files/wekom.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0072/files/gotolexexidibalekagekopok.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/sidibowuxagejopunu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5957/5958/files/fegitezatewilogedokunidos.pdf
    • https://static.usrfiles.com/ugd/b8c837_74e0458252074051bff3d1f92af7861c.pdf
    • https://static.usrfiles.com/ugd/b8c837_db36a262cf0345a29e1921386e480fe3.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/manualidades_con_carton_de_huevos_flores.pdf
    • https://cdn.shopify.com/s/files/1/0464/7190/5448/files/iq_test_questions_and_answers_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/dajepopisexo.pdf
    • https://cdn.shopify.com/s/files/1/0457/7224/3110/files/absolver_guide_marked_ones.pdf
    • https://cdn.shopify.com/s/files/1/0430/9542/5191/files/71503434578.pdf
    • https://cdn.shopify.com/s/files/1/0432/7279/8373/files/botw_energetic_rhino_beetle_farming.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_off00006212.bin
8ed9b61b1648a71b96d7ac759a549df6962f1c959d3944c5fbbc2f0947856fbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6212 4972 bytes
font_01_sfnt_off000072ee.bin
62a25a15e5a478bd9b815ac83764d9a928429bce0eefda5d577d1246156cb1e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72EE 9880 bytes

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