Malicious PDF — malware analysis report

Static analysis result for SHA-256 f23e4ef24831130d…

MALICIOUS

PDF

54.7 KB Created: 2020-10-29 04:11:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ad87beff23afddb9906ada8a1ed258b7 SHA-1: b76524ab220ee7eda01703fcc48869dfe3123611 SHA-256: f23e4ef24831130d77890dfcf46f08722d93afe7f01e8be53e40c8656c2cf92c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, containing numerous embedded URLs that redirect to various external sites. One of the primary URLs, 'https://ggtraff.ru/strik?keyword=one+piece+wapol+episode', is flagged as a malicious redirector. The document's structure and the presence of many links suggest an attempt to lure users to potentially harmful content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ggtraff.ru/strik?keyword=one+piece+wapol+episode In PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/4054812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370764/normal_5f8952c1a1be4.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/2475735.pdfIn PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/juxagetemi_wovobuzokovup_dojuxuvad_duvinetipezaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_5f9217886d9b0.pdfIn PDF document text
    • https://moxipilewuzeget.weebly.com/uploads/1/3/4/3/134360433/4928540.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/dajijakigodib-dozadora-takono-retepagow.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/navixidumavofuge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5f926ec20eac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f8bdd35f0d28.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/a8fc2343-24fa-457c-af01-ce9f50e0abf3/1572863662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4809/9736/files/subizedidasedudazoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6400/7585/files/belerowidarofilakojefov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2540c65c-998e-4ffd-b47b-c2fd276dad52/94687930629.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/briefcase_allowance_dopt_order_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/mathematics_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6935236-a254-4c92-b5c2-b14167b954d1/jewijininepivu.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/97316525273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66a8d03d-0e24-4faa-b892-7c1f45855ecf/rabipojese.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/21220054399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b814f130-3630-4154-8baa-4203213d0a6c/wuduvenovesubovege.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E03 5088 bytes
SHA-256: 5c812605a2722b4a0ae5fa3c2154b8be409f4b14bc5c9bdb21c48a1a1003d5cf
font_01_sfnt_off00008f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F72 10896 bytes
SHA-256: f2b1c8ea25c347dc9fd78f88782f0228b3de5b8756c4e8ef6a206f4f90673040
font_02_sfnt_off0000b3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E8 17368 bytes
SHA-256: 9f32e228567fc19d7bdcc9dc56dc30508911983f2a5e29569e9949bcea513f19