Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b1c041ec0e465a…

MALICIOUS

PDF

41.0 KB Created: 2020-10-10 07:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-06
MD5: dab79fa276a7ff9690cf1d24afe6455a SHA-1: 1f038c3e103ec63bafe459e7f70084be4c2d415d SHA-256: a8b1c041ec0e465a857a9a24533fd56d556d84fe75974dc7bd18fd56d20a27e5
124 Risk Score

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=mary+oliver+thirst+pdf In PDF document text
    • http://files.360signs.com/uploads/1/3/0/8/130874482/546569.pdfIn PDF document text
    • http://xarekos.unfinishededucation.com/uploads/1/3/1/4/131406071/likugarofoba_zabux_kaxuluvujekitem_falula.pdfIn PDF document text
    • http://files.rachaelbyrnes.com/uploads/1/3/1/4/131454035/7703036.pdfIn PDF document text
    • https://site-1041677.mozfiles.com/files/1041677/85245215010.pdfIn PDF document text
    • https://site-1039271.mozfiles.com/files/1039271/pifem.pdfIn PDF document text
    • https://site-1040359.mozfiles.com/files/1040359/potidepopiludalibisuba.pdfIn PDF document text
    • https://site-1039875.mozfiles.com/files/1039875/37698707018.pdfIn PDF document text
    • https://site-1039784.mozfiles.com/files/1039784/90314016270.pdfIn PDF document text
    • https://site-1037142.mozfiles.com/files/1037142/resotason.pdfIn PDF document text
    • https://site-1038612.mozfiles.com/files/1038612/dopewizebufowez.pdfIn PDF document text
    • http://bivisibap.dobiedomain.com/uploads/1/3/1/6/131606289/luxowulusulud.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006308.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006308.bin)
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off00006308.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6308 5296 bytes
SHA-256: fb41380590a7f2afab92741d291676fab2fde7cf708b0a0e81bd53e3526108af
font_01_sfnt_off0000751b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751B 10120 bytes
SHA-256: 3d5ca790def39045c07975526796ac7f41305d189f6cf51e1e97a9f1b3d64489