Malicious PDF — malware analysis report

Static analysis result for SHA-256 161e007993ec7079…

MALICIOUS

PDF

55.7 KB Created: 2020-10-07 14:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d42357cf85eccaa64ecc9ee21315c4c SHA-1: 43bef000cbff72bda98d04dab7590550837c079e SHA-256: 161e007993ec7079fc79507af4be17c5c1ab8b07e019c709ee36bf9198193ac6
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or malicious content distribution attempt. The embedded URL 'https://cctraff.ru/strik?keyword=real-+life+discipleship+training+man' is a critical finding, suggesting the document is designed to redirect users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

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://cctraff.ru/strik?keyword=real-+life+discipleship+training+man
    • http://wipujoke.ejchscounseling.com/uploads/1/3/2/8/132816042/9739870.pdf
    • http://buputep.bynancyohare.com/uploads/1/3/1/4/131438096/97070fc56f0ee4.pdf
    • http://files.dhnevins.com/uploads/1/3/0/8/130873807/61bb17b48e20.pdf
    • http://files.perhappened.com/uploads/1/3/2/8/132815002/1717746.pdf
    • http://files.kymbreanne.com/uploads/1/3/1/3/131379709/e4c78e72.pdf
    • http://fubez.myhamercandy.com/uploads/1/3/1/4/131437774/nezesowijuto.pdf
    • http://files.canaseragafestival.com/uploads/1/3/1/6/131607019/botajaridekikaj-sijufojovutube-sukemaxigumujag-fuwavevuwur.pdf
    • http://files.mrgona.com/uploads/1/3/2/6/132682768/fadezevep-kateses.pdf
    • http://diwuje.advancedliferesources.com/uploads/1/3/1/4/131483830/9160097.pdf
    • https://site-1041081.mozfiles.com/files/1041081/17917910582.pdf
    • https://site-1039456.mozfiles.com/files/1039456/14241254296.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_off00008fac.bin
f008b0dab994e5fec64c2c32696711603698f322af82c4043d6c8a1b2f38a153
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAC 5284 bytes
font_01_sfnt_off0000a17e.bin
c6eb16711e5aa174c3eba03817032d1fd276bc01e470eb559ba57a6cfe207d85
pdf-font-stream PDF embedded font (sfnt) at offset 0xA17E 10052 bytes
font_02_sfnt_off0000c3c5.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C5 4324 bytes