Malicious PDF — malware analysis report

Static analysis result for SHA-256 191767921f740043…

MALICIOUS

PDF

58.4 KB Created: 2020-08-18 13:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b6f7d6bcb1b0442037777e40bcbc36b SHA-1: 072a584a3e8c63a919909f1b16444a356d845e28 SHA-256: 191767921f740043557b44b41919b0f822278762292a80713dc740ff27818f15
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, pointing to 'https://ttraff.cc/pify?keyword=vocational+training+council+annual+report'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, some of which are hosted on potentially malicious domains like 'janudor.yeaflicker.com' and 'demanddj.com'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the redirector URL, suggesting the primary intent is to drive users to malicious 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.cc/pify?keyword=vocational+training+council+annual+report
    • http://janudor.yeaflicker.com/uploads/1/3/0/8/130815097/9299f9fc1.pdf
    • http://files.demanddj.com/uploads/1/3/2/7/132740260/mulekobepojuba_buzuniwirosakos_sosutu_zodudawe.pdf
    • https://cdn.shopify.com/s/files/1/0437/8784/5790/files/gmail_snooze_feature.pdf
    • https://cdn.shopify.com/s/files/1/0434/5764/2648/files/dr._adonijah_ogbonnaya_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/7011/2423/files/list_of_important_national_days.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3616/files/65019578268.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/60554050544.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2722/files/the_history_of_money_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/7936/7845/files/dixiranawojukata.pdf
    • https://cdn.shopify.com/s/files/1/0428/2764/5084/files/93204748177.pdf
    • https://cdn.shopify.com/s/files/1/0434/1609/2828/files/petition_for_adoption_form_florida.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/bojogewelolaw.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
stream_003_off00006575.bin
246a01c43675403a48800f0871001e6bc99a8f74740d3e98b0769722861fc3db		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6575 21620 bytes
font_01_sfnt_off0000a8c0.bin
f451140cc3e2f20c20b663ce1e01dc414e68d1e74a92ba89e082b338343622b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8C0 4888 bytes
font_02_sfnt_off0000b969.bin
06233a39c717a8299eeb1e1e309de2e21b77cf64061132af6bea6eeed6217886		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB969 10352 bytes

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