Malicious PDF — malware analysis report

Static analysis result for SHA-256 621d013348699800…

MALICIOUS

PDF

40.7 KB Created: 2020-08-22 10:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 641ad9bf00158f98f630c0315da94a05 SHA-1: d8fc1d1f22d571d05af98aacdb1004446efe29da SHA-256: 621d013348699800abe5241b71d86ff1464855234ad959d6fbd65ee4353c2870
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, with the primary URL pointing to a known malicious redirector. This suggests the document is designed to lead users to malicious sites, potentially for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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://ttraff.com/pify?keyword=the+18th+brumaire+pdf In PDF document text
    • http://gevukim.atimetodancelv.org/uploads/1/3/1/3/131398575/a424e9.pdfIn PDF document text
    • http://girogas.hotstuffromance.com/uploads/1/3/0/8/130874277/fewigunanizadaw.pdfIn PDF document text
    • http://files.bordasmusic.com/uploads/1/3/2/6/132683121/54eea6268402c5.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/1/0436/8180/8549/files/vidixejumuvipuwisodedeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5543/8234/files/modele_attestation_d_hebergement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8542/0949/files/us_market_holidays.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4094/8892/files/56516286159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6405/0332/files/steam_api._dll_batman_arkham_asylum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4049/6033/files/agenda_request_form_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6091/9462/files/gesenofobuzaruzimadowafed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewugokujugiwiburonanas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6675/2164/files/content_plan_template_facebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6558/1469/files/vigipif.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_off000061cd.bin
d1558877ebcb7e4f217d88605ebc3ff031f0d8e07ea7f2ca58c8cef857ac5925		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CD 5408 bytes
font_01_sfnt_off00007417.bin
2c187329b1264f0e29b4f6fcccd46efdbbac0bab5926821071c8be3a7b25a397		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7417 10088 bytes

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