Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0a4015829eb6ab…

MALICIOUS

PDF

38.0 KB Created: 2020-08-21 11:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d25b1e167fb2f53cbb0eab6ab4f16ed0 SHA-1: 2c3ee7266add906d7eea8a63ea04457f3d300722 SHA-256: 6a0a4015829eb6ab575ec629695f8fb3bb4f4536fc636ce7ed79100ffecf09cb
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=movies++through+utorrent', is identified as a malicious redirector. The document body, though partially corrupted, contains this URL and other Shopify links, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent, likely to redirect users to a phishing or malware download site.

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=movies++through+utorrent
    • http://xunevap.1stvoice.com/uploads/1/3/1/6/131637036/ab1d414e48.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/32672450059.pdf
    • https://cdn.shopify.com/s/files/1/0432/2577/6288/files/8687410102.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7813/files/cahier_de_vacances_gs.pdf
    • https://cdn.shopify.com/s/files/1/0436/5395/5742/files/47597584669.pdf
    • https://cdn.shopify.com/s/files/1/0438/7084/7131/files/3205782816.pdf
    • https://cdn.shopify.com/s/files/1/0429/3538/6265/files/antivirus_for_laptop_windows_8._1.pdf
    • https://cdn.shopify.com/s/files/1/0439/5496/2590/files/administrador_de_dispositivo_android_apagado.pdf
    • https://cdn.shopify.com/s/files/1/0435/6961/0907/files/autocad_plant_3d_free_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0452/5244/4320/files/rural_area_certificate_rajasthan.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7381/files/sample_of_formal_letter_writing.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058ec.bin
66a54f6f6c9985bda3fd38bc1cd5d654aaf3a131ebf877a4951e0b8afef9b21d
pdf-font-stream PDF embedded font (sfnt) at offset 0x58EC 4768 bytes
font_01_sfnt_off00006933.bin
92e1ff10ea3031f70c2d8f4850b611a1b26c4d40884c5ce0663e16ff698dfea4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6933 10176 bytes