Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f92b08fbc83e6ef…

MALICIOUS

PDF

50.1 KB Created: 2020-10-12 16:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28
MD5: 57076c160a972a82abd41aa132af2a9d SHA-1: 0720c2d3a255732e4fcee2443ffb90e1945541d8 SHA-256: 9f92b08fbc83e6ef316cd5552cd7bfb59812cde1d6c9216466eba9071591f163
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One of the primary links, 'https://ggtraff.ru/strik?keyword=skripsi+administrasi+publik+kuantitatif+pdf', points to known malicious redirector infrastructure. The document also exhibits characteristics of a link farm, with many URLs pointing to benign Shopify files, likely an attempt to mask malicious activity or improve SEO for malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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://ggtraff.ru/strik?keyword=skripsi+administrasi+publik+kuantitatif+pdf In PDF document text
    • http://files.artbymadelinesmith.com/uploads/1/3/1/3/131379047/sopojibunap_kogidagul.pdfIn PDF document text
    • http://files.jamesfmuench.com/uploads/1/3/0/9/130969826/4050274.pdfIn PDF document text
    • http://files.redyogaannarbor.com/uploads/1/3/0/8/130815095/1427815.pdfIn PDF document text
    • http://files.nadjalitau-photography.com/uploads/1/3/1/1/131163927/752769c31d396f.pdfIn PDF document text
    • http://zasotar.thenanoporesite.com/uploads/1/3/0/7/130775705/bazopajarureza_xotowuvaji_fejofiluxid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/plague_inc_simian_flu_achievements.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1906/7815/files/eureka_vacuum_cleaner_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4514/9079/files/soguzulugovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/8901/9039/files/living_environment_core_curriculum_workbook_answers_set_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0683/2024/files/exe_to_apk_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2486/2365/files/sagemcom_fst_5280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc32e04d-83f8-4ae2-bdd7-f3ba4ae370f9/navuwigukobobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca2614a3-18f4-4481-ad48-e9559dbdee76/pawolulaliduxuramukojotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ac02aec-fe67-4563-8bb1-dcc42e78019a/16967076425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f95fdaf-74c1-40ff-b8f0-b1392b5d02f4/66762613159.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_off000078bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BF 5148 bytes
SHA-256: c69ea3bdaa8d3c626fce1f865c8e09cd9419ee79dedb89189d6a7b9cb1774996
font_01_sfnt_off00008a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A08 10444 bytes
SHA-256: 39e8bf07ba1614f2218ce37d194cbd195da2dae86e747e7726b0045e5498e3e5
font_02_sfnt_off0000ad84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD84 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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