Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1d3f8a182284e5…

MALICIOUS

PDF

47.1 KB Created: 2020-09-28 16:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0206b1334216f0896ae4f42b837ceb25 SHA-1: 0096d48630a3c60496425b7df8ca1de445ac9842 SHA-256: 5f1d3f8a182284e5a0cdb6e269ad44febe0d3cfcc43fe1cd4657e88b01258131
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm, with one URL pointing to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves directing users to potentially harmful websites, likely for SEO spam or to serve further malicious content.

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://gettraff.ru/mozel?keyword=espa%25C3%25B1a+en+africa+subsahariana+pdf
    • http://temeba.everythingmotorcyclerider.com/uploads/1/3/1/4/131406893/7292723.pdf
    • http://jufaze.piecesoftimesouth.com/uploads/1/3/1/1/131163992/woxedixol-gexokedabov.pdf
    • http://files.intuitionlive.net/uploads/1/3/0/7/130739892/9677283.pdf
    • http://files.hypnosisworkz-sp.com/uploads/1/3/2/6/132695352/6278970.pdf
    • https://site-1036627.mozfiles.com/files/1036627/munuruligokanizu.pdf
    • https://site-1037178.mozfiles.com/files/1037178/zodusujuxukizex.pdf
    • http://files.lifeenergypowers.com/uploads/1/3/0/7/130775627/3491163.pdf
    • http://lixipozo.rosintonumc.net/uploads/1/3/1/4/131453060/8e02d0.pdf
    • http://files.brighterawards.com/uploads/1/3/1/6/131606819/nomupeguvevafawi.pdf
    • http://tejigeb.ridefastcoaching.com/uploads/1/3/0/7/130740190/e1a1caee8d9794.pdf
    • http://bovis.racefansforever.org/uploads/1/3/1/4/131408170/bawegowosu_sunudozoxuren_kujofudaxaxov.pdf
    • https://site-1036764.mozfiles.com/files/1036764/zefewezomerapa.pdf
    • https://site-1036858.mozfiles.com/files/1036858/rawopedulosule.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_off000069ac.bin
0f2bb7155f9bb571c70c35540365e7d069938f0205e00a1d5dc6645451ee45f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x69AC 5212 bytes
font_01_sfnt_off00007afc.bin
fec64500042e90dc7255ef29d67c2a0b346df369d6f5230bfa44d2f670c1d503
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFC 11196 bytes
font_02_sfnt_off00009f87.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F87 4324 bytes