Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddcaad9b9cc4c675…

MALICIOUS

PDF

40.2 KB Created: 2020-10-13 19:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 982b8b639e235c536ea42a979dbefe4d SHA-1: 90e96afca1d78c2e3274e78be44f7374c5dd94fe SHA-256: ddcaad9b9cc4c67588f0b47cfd66d1d7c6e65ea620d444fbb68e1981b6d68498
124 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://cctraff.ru/strik?keyword=modelling+and+simulation+in+chemical+engineering+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'modelling and simulation in chemical engineering pdf', suggesting a lure to disguise malicious intent. The ML classifier also strongly indicated maliciousness.

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=modelling+and+simulation+in+chemical+engineering+pdf In PDF document text
    • https://site-1039669.mozfiles.com/files/1039669/kedugigokeri.pdfIn PDF document text
    • https://site-1037086.mozfiles.com/files/1037086/zexomurovizelaz.pdfIn PDF document text
    • https://site-1039417.mozfiles.com/files/1039417/14885958967.pdfIn PDF document text
    • https://site-1043297.mozfiles.com/files/1043297/sedubuwu.pdfIn PDF document text
    • https://site-1037054.mozfiles.com/files/1037054/nifezoxazawabukuju.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/lixavej_rivutavipulox_vunezikavad_lirumonoguwako.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/bawap.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/4102594.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/16bc9c89-0d79-4257-a7f4-77d2cea3cf3d/butozanevegemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a13a828f-be29-4c99-924f-d1540f5dbb3e/rotajekedolixet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f187b30-fe56-48a0-927d-29928dce6f4e/38664243817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8536/4390/files/31912620611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4523/9456/files/saturn_in_libra_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8406/2626/files/97630271203.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_off00005dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDA 5572 bytes
SHA-256: d4be59a0abaf795e0e8c51de965cbe387fec663d07aeb1c2df2d13c2d4446cc5
font_01_sfnt_off000070b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B0 10400 bytes
SHA-256: 1da217fb4177e3e9ac82e975611359934fdf39461defd4b4b4b6bcd85ee33aec

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