Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ea8e7aac833e4e…

MALICIOUS

PDF

47.5 KB Created: 2020-09-30 16:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 435c7256bf34083492fa08c93eec5479 SHA-1: dd7e4694942e97cbb973be13354f087cc2dbef31 SHA-256: 26ea8e7aac833e4e5eb31327a3fc9cd4a7660292084110c5a3be0df7dceaec5c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious due to its function as a link farm, containing numerous external links. One prominent link directs to 'ggtraff.ru', which is flagged as a known malicious redirector. The document's structure and the presence of many links hosted on disposable domains suggest an attempt to distribute traffic to potentially harmful destinations, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ggtraff.ru/strik?keyword=penyakit+inflammatory+bowel+disease+pdf In PDF document text
    • https://site-1037000.mozfiles.com/files/1037000/86572500919.pdfIn PDF document text
    • https://site-1037143.mozfiles.com/files/1037143/49087310675.pdfIn PDF document text
    • https://site-1036852.mozfiles.com/files/1036852/36206717856.pdfIn PDF document text
    • https://site-1036977.mozfiles.com/files/1036977/26245186668.pdfIn PDF document text
    • https://site-1036785.mozfiles.com/files/1036785/miwofusovop.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/90699544518.pdfIn PDF document text
    • https://site-1037098.mozfiles.com/files/1037098/vodomozozebexitudes.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/koniberixuxotisetapufepo.pdfIn PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/kefudosatekam.pdfIn PDF document text
    • http://kalob.birdsofpreytexas.org/uploads/1/3/0/8/130874254/5209746.pdfIn PDF document text
    • http://files.saviainhomecounseling.org/uploads/1/3/1/6/131637136/2206047.pdfIn PDF document text
    • http://files.georgektan.com/uploads/1/3/1/6/131606059/defiverexuditaf.pdfIn PDF document text
    • http://babarodaz.saaca.org/uploads/1/3/0/7/130739063/9328162.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6648/6684/files/swingline_optima_70_electric_stapler_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7883/4583/files/65993306922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/73827302753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/pm_awas_yojana_online_form_rajasthan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6749/0975/files/30807777695.pdfIn PDF document text
    • 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 PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7636 5588 bytes
SHA-256: f72b82c49e012b2d568410e998b69cb8f685126c14a2a1fcc4fd6fb2e5e6f112
font_01_sfnt_off00008939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8939 12224 bytes
SHA-256: 7b276a70bc9c0db06853129b9a78a63a12058137a39d910fc9165742519fb90f

Open this report in the interactive analyzer, or submit your own file for analysis.