Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d5d07255a1a61d…

MALICIOUS

PDF

53.3 KB Created: 2020-08-18 14:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f98b0fabad8f39f939fc179b331d8576 SHA-1: 4a8df27ea34b46bada82769ab89663fbf885608a SHA-256: 11d5d07255a1a61d0d431aa2cb7e6e88c386ad9d9a1f19dcaa3c36065b5968d7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com, disguised as 'unicorn coloring sheets for toddlers'. This indicates a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious links and the document's deceptive content strongly suggest a phishing or malware delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=unicorn+coloring+sheets+for+toddlers
    • http://files.pawac.org/uploads/1/3/2/6/132681690/3045027.pdf
    • http://files.blindsail.com/uploads/1/3/1/3/131381546/lolifosugovew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/8009/5646/files/nidugexabuvamuveworum.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/13868590135.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1218/files/36398393824.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/nezasoku.pdf
    • https://cdn.shopify.com/s/files/1/0433/4311/8495/files/sipamatudosememojuzofoko.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/befunifanumot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xewujixamugovaginebutomo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0906/3582/files/67127457824.pdf
    • https://cdn.shopify.com/s/files/1/0431/3785/9735/files/free_pay_stub_template_with_calculator_excel.pdf
    • https://cdn.shopify.com/s/files/1/0439/0980/8283/files/agribusiness_management_books.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007df5.bin
8d2c993871832180c6241acce8e835d224b162d743d23d880923817225af04f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF5 4852 bytes
font_01_sfnt_off00008e5d.bin
b951a3fed10b3bc61ae902a7354eb001edc453955ab72213c311a72841c52efe
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5D 13904 bytes
font_02_sfnt_off0000b9fd.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9FD 4324 bytes