Malicious PDF — malware analysis report

Static analysis result for SHA-256 4668c776becbc049…

MALICIOUS

PDF

44.6 KB Created: 2020-10-17 02:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3814f4149e5242597f09e58490470c52 SHA-1: e3589311dadcca8f2926966e0a9e97436b414612 SHA-256: 4668c776becbc0494cfceb7201aae676d5267191d22952eea8c006fa697c27a7
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to distribute malicious content or phish users. No scripts were extracted, but the presence of a malicious redirector and a large number of external links points to a clear intent to lure users to harmful destinations.

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=little+voice+mastery+diagnostic In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f870e97d1cbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f893b385f3fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_5f88c8c4efc18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374211/normal_5f89dc164e932.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/vaxukekiwurefebe.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/nitaba.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/baputedev.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/42309a544ef47.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/803ee4b.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/1/0428/5664/4774/files/forward_roll_banjo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4719/4276/files/meaning_in_hindi_to_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7431/4946/files/supegoxetanukabet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/pka_carboxylic_acid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1552/0935/files/xavebuvegumemosufun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5044/8549/files/alchemy_of_nine_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/876c9630-3ffe-4f13-810f-a29bccc32e5c/mobudix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/107e1311-8d64-4f7d-af5b-4110ccb50478/92663196025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/324da0c4-04f8-429d-937d-f49a80419ef0/fobabamim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee6d7ab-cba6-43ea-9c5f-9292e7514ee1/61619068158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7817/5908/files/35785310556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2951/0814/files/interpersonal_theory_of_psychiatry.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_off00006d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D77 5364 bytes
SHA-256: 671a319b46b534057d6c2cbf5bf88eeba32559a9e4245e0c14e1d9aec09e55d7
font_01_sfnt_off00007fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA5 10936 bytes
SHA-256: 755808b92061cf80a436735c8b70945eeb9a310d8b499d8c3637d7f4cc1dd48f

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