Malicious PDF — malware analysis report

Static analysis result for SHA-256 3036482bb012c67f…

MALICIOUS

PDF

44.0 KB Created: 2020-11-06 09:52:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2c321e9fd57c2cdd91dbd6a04caf666b SHA-1: 27bf7735d6c6fd313e6862ab249de20522c80a0b SHA-256: 3036482bb012c67f92b0c241b125040c2a71f4af68feba5c8c6345652669665f
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic PDF_SEO_LINK_FARM specifically flags this behavior. The embedded URL 'https://traffset.ru/strik?keyword=search+for+mallory' directly supports the attack pattern of luring users to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/strik?keyword=search+for+mallory PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457861/normal_5fa2c3419fd98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417988/normal_5f9a7ab7e6349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_5fa4c0114b71e.pdfIn PDF document text
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/3662564.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fikuvine/gudimajovegagedurerefika.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/48920810897.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/billie_jean_guitar_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/15865747489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04fec28e-b221-400b-ae07-d7d0ddb9e180/stardew_valley_harvest_moon.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/massachusetts_commercial_drivers_license_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5571f4b-9fd0-4007-a6f7-c9a6022b3def/my_singing_monsters_breeding_chart_cold_island.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_off00006c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C85 5148 bytes
SHA-256: 2cfa9a1f76428350dee2a4fb4921a7ed96011364956683f98eed240417c7e39c
font_01_sfnt_off00007de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE9 10928 bytes
SHA-256: 5c3e9dfabf2e24213a05c8770093b28990a0cfdb83047c7f66ea562ab36e7966