Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e5ab56ae6551cf7…

MALICIOUS

PDF

36.2 KB Created: 2020-08-13 19:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06095cf80c958482dfc7077dce579fc2 SHA-1: 652a0fb2d0d32d621724370fabfb497f7c4ffc9e SHA-256: 5e5ab56ae6551cf78c8ca61ab650741ed2976d1a153d3fea57ce49f5664535d7
154 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. It also presents a large number of external PDF links, suggesting a link farm for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious verdict.

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.cc/wb?keyword=cpt%20book%202019%20pdf%20download
    • http://files.b4salon.com/uploads/1/3/0/8/130874063/nupigejemezipoti.pdf
    • http://files.frenzdeckandiriesrest.com/uploads/1/3/0/8/130874493/xowevatoxi_dikulunebigu.pdf
    • http://files.keriannstudio.com/uploads/1/3/0/9/130969790/5070652.pdf
    • http://files.discipleschristianfellowship.org/uploads/1/3/0/7/130775309/lipujumuvid-megolog-fimanatubub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2011/6387/files/007_gun_barrel.pdf
    • https://cdn.shopify.com/s/files/1/0436/3255/8240/files/39054609685.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tobilefoseparavako.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/barcelona_aerobus_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/30564709214.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/87679430653.pdf
    • https://cdn.shopify.com/s/files/1/0438/7835/1003/files/1991_chevy_silverado.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwunojipodaga.pdf
    • https://cdn.shopify.com/s/files/1/0438/6773/4176/files/galepusaralim.pdf
    • https://cdn.shopify.com/s/files/1/0429/4311/9527/files/bloodlines_book_1_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/83801347420.pdf
    • https://cdn.shopify.com/s/files/1/0432/3413/2131/files/52979539796.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_off00004ec9.bin
823fc2585e0fa44a77a626e21a135b105ac881c1ab17ece35e04c05dd6ebf28c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC9 5444 bytes
font_01_sfnt_off00006173.bin
557f5d2bef02a3deb09d98cd2dd20c9d4fc7e95e76a1c46c1d3b78cefbc0b521
pdf-font-stream PDF embedded font (sfnt) at offset 0x6173 10244 bytes