Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f5025694444ed1…

MALICIOUS

PDF

39.5 KB Created: 2020-10-13 03:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85889adef559e88ec28c42a53a103c63 SHA-1: 353ba5d1f572c77fbc7b8d6c700f2f865181431f SHA-256: 11f5025694444ed1fac957f9bfb55cc65b9d6f49eb193bcf249d4ed1581a4f47
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious content. The primary redirector URL identified is https://ggtraff.ru/strik?keyword=wireless+network+security+book+pdf. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's intended to exploit users through deceptive links.

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://ggtraff.ru/strik?keyword=wireless+network+security+book+pdf
    • https://site-1036939.mozfiles.com/files/1036939/23646801781.pdf
    • https://site-1036925.mozfiles.com/files/1036925/wabadekusimofijapipev.pdf
    • https://site-1038737.mozfiles.com/files/1038737/dajev.pdf
    • https://site-1036680.mozfiles.com/files/1036680/zedowolopukadofopelemami.pdf
    • http://ruwow.communitybuildersnz.org/uploads/1/3/2/6/132682063/8ebaed28c74bd.pdf
    • http://files.guntersvillelionsclub.com/uploads/1/3/1/4/131407135/wewilemutinaxin.pdf
    • https://site-1036929.mozfiles.com/files/1036929/modesovatizisin.pdf
    • https://site-1039187.mozfiles.com/files/1039187/77895289950.pdf
    • http://busajido.tblacblog.com/uploads/1/3/1/0/131070357/fekukuzi.pdf
    • http://files.westech-rides.com/uploads/1/3/1/4/131482931/7509329.pdf
    • http://vopofaket.penultimatephotos.com/uploads/1/3/0/9/130969264/kuxijapufidugoj-jomawizakog-zejejegekizudi-setobu.pdf
    • http://files.isrgrandrapids.com/uploads/1/3/0/7/130775076/6335983.pdf
    • http://files.lifebytheshore.com/uploads/1/3/2/3/132302992/buximeku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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_off00004e63.bin
5117a31938e687edcb11b02c59511269b4dab4a9f87fe3a7f88ea8d53b6a0365
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E63 5232 bytes
font_01_sfnt_off00006055.bin
c9e84e28f1dac64f2f0a666ccd9f49f3f50f2b8bb10ff2307d57113b272e4f75
pdf-font-stream PDF embedded font (sfnt) at offset 0x6055 10320 bytes
font_02_sfnt_off00008325.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8325 4324 bytes