Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6162ca3485b6eae…

MALICIOUS

PDF

40.0 KB Created: 2020-10-05 00:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9dfb5b8982d9b1d5353e6c66f258422b SHA-1: d49ea66348c275c64d6f713dbbf32f2c8f59d018 SHA-256: c6162ca3485b6eae1e4e24f3b8f14088a0a2025b7db3f8504d07a456c530deff
124 Risk Score

Malware Insights

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

The PDF contains embedded links and text that direct users to a known malicious redirector URL, ggraff.ru. This URL is part of a link farm hosted on disposable infrastructure, indicating a likely attempt to distribute malware or conduct phishing. 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 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=language+disorders+from+infancy+through+adolescence+5th+edition+pdf+free In PDF document text
    • http://sitevebe.sanandresbrooklyn.org/uploads/1/3/0/7/130776257/pemujogifunuw-jedabi-getadera.pdfIn PDF document text
    • http://jikapo.biamontestables.com/uploads/1/3/2/6/132696030/c0149b701.pdfIn PDF document text
    • http://gitosu.speakerthoughts.com/uploads/1/3/1/0/131070571/pavalugusiba.pdfIn PDF document text
    • http://files.down-the-block.com/uploads/1/3/1/3/131379554/fesedosutur.pdfIn PDF document text
    • http://files.tarawattdesign.com/uploads/1/3/1/6/131606758/zavuf_kudikexevozag_vuzifowak_nevirobujatole.pdfIn PDF document text
    • http://rerizaxe.lifechurchsouthmansfield.co.uk/uploads/1/3/0/7/130739164/0d0e471f.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/1/0485/9910/5696/files/zumopigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8860/4061/files/how_to_lower_ping_in_fortnite_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0418/6783/files/kiluxudip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fefe6642-6872-40f5-be65-04a962f92fa1/39877801078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97da2b9c-7c08-4d14-ac8c-6ab07d23ddf4/90757889000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ea212a8-91b8-48a8-9616-8eb815ba04a0/73092774925.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_off00005c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C93 5736 bytes
SHA-256: e0ffa471909be9fad29c94441aeeec185f0aa4ae94a4f4f568f78dde5aed00de
font_01_sfnt_off00007003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7003 10188 bytes
SHA-256: 2b945565a025671bc99e0cbf9a2a75d51e30860f4401febdfd37247f453ad37c

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