Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b853d6aaaf3e2dd…

MALICIOUS

PDF

43.6 KB Created: 2020-10-29 15:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06aababbb38b8e520563c283cdbe8473 SHA-1: 9341a0018ce02675f379a76c1b8ba5e8a1f166c8 SHA-256: 8b853d6aaaf3e2dd6596e9486c292a77c4ae55b2fa129db53aa3335881aa4021
94 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The embedded URL, https://cctraff.ru/strik?keyword=jason+stephenson+guided+sleep+meditation+forest+relax, is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, but the presence of a malicious URL within the document body strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=jason+stephenson+guided+sleep+meditation+forest+relax
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4f7d8c0e-2095-4825-800a-fe8192148824/bibifijikuxirawuxu.pdf
    • https://uploads.strikinglycdn.com/files/996448ae-cee2-475c-9050-6e77db6d33fe/9375896747.pdf
    • https://uploads.strikinglycdn.com/files/fdf165f2-91b3-4e7f-9eda-2099341f0728/fupovevuwevol.pdf
    • https://uploads.strikinglycdn.com/files/ea12506e-61ac-4dfa-9591-ee4346832845/36003296657.pdf
    • https://uploads.strikinglycdn.com/files/bf4d6d2a-8c1c-43f8-9980-33d596c87ab8/zafusedoxivakoz.pdf
    • https://s3.amazonaws.com/zirojopemup/bizikedekalavaralopi.pdf
    • https://uploads.strikinglycdn.com/files/e563cd2e-8229-4582-b75e-32e8049ae099/kegaloverexiriligokuzidig.pdf
    • https://s3.amazonaws.com/defujo/bitcoin_as_an_alternative_investment_vehicle.pdf
    • https://uploads.strikinglycdn.com/files/26ec85f2-4e90-4a3c-a660-baa498c199d7/putixevoroga.pdf
    • https://uploads.strikinglycdn.com/files/bd3eb5a3-cdb7-4de3-bce9-901a689939e7/74473310811.pdf
    • https://uploads.strikinglycdn.com/files/ba4ae2f7-da6d-4e75-b0ec-1bda4010ffe2/somarunelabozerogofedow.pdf
    • https://uploads.strikinglycdn.com/files/5fd62e49-385b-4364-a590-94cb47de8c08/fasox.pdf
    • https://uploads.strikinglycdn.com/files/f6d0ee92-7ec3-42aa-afc5-d096129c856b/60704808237.pdf
    • https://uploads.strikinglycdn.com/files/9049f70e-390d-4986-a0ce-60d0feab828c/98750222632.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000680a.bin
7f1c9540dbe54f94ac34d9c6cfc43fceb4bce5454ff8b88eb00a0d0128f1b0ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x680A 5512 bytes
font_01_sfnt_off00007aa4.bin
ece70ab2e3cc1fa87e76adc40743742e2ea831b9ab2760f7e77751102a6b3578
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA4 10676 bytes