Malicious PDF — malware analysis report

Static analysis result for SHA-256 547920e67fbda80c…

MALICIOUS

PDF

53.8 KB Created: 2020-11-08 01:59:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 01b7b4360b66e7f1de5ed66f27d24ebf SHA-1: b3e76cec654393aba4d845ec1fa623ce65d89003 SHA-256: 547920e67fbda80c1deee76741c72ef2e4b9437c33ee35436df5c6ee53b35d4f
124 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, traffking.ru, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting a deliberate attempt to direct users to this malicious site. The ML classifier also strongly indicates 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://traffking.ru/aws?keyword=in+search+of+the+temple+quest In PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/9594994.pdfIn PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/zavuvuvinigawowu.pdfIn PDF document text
    • https://jorimedazaget.weebly.com/uploads/1/3/0/7/130738946/a615c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_5f912dad8d8b1.pdfIn PDF document text
    • https://vuzirokisex.weebly.com/uploads/1/3/4/5/134576988/6307413.pdfIn PDF document text
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/0c9d1.pdfIn PDF document text
    • https://zeburunonuf.weebly.com/uploads/1/3/4/4/134458398/78513c542ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_5f922b3c2a4b8.pdfIn PDF document text
    • https://dawozonejuveru.weebly.com/uploads/1/3/4/4/134489779/kafor.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/401afb62-4ce4-4fe1-9430-3bd804e519d8/dadidakogaxurajusax.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/9543071187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aeec0b2-bc13-4280-87f2-92798ab856e8/92711389400.pdfIn PDF document text
    • https://s3.amazonaws.com/newopetusam/fairfield_university_alumni_login.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/filters_and_attenuators.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000088dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88DD 5320 bytes
SHA-256: 68d1b6b1e04ec5d338f01bde51f38410b40c14d1cb5b5cc8479ecaeaffc8284b
font_01_sfnt_off00009ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC5 2216 bytes
SHA-256: 4da52e802202759687fb580cbe6e101de1db8d2fa1e91a5243f45b58079cd86e
font_02_sfnt_off0000a425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA425 11060 bytes
SHA-256: 74f83e3c1a12936cb8c6542e1f00762db79825e3014d38716ca17c8c7ed07748

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