Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6adb176c06efbc…

MALICIOUS

PDF

45.4 KB Created: 2020-10-29 07:31:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28
MD5: c8f193b68e72da4baa387e1387a2e3de SHA-1: 4c1a8be10ba760827c44184c8dbc51868d0593b6 SHA-256: 9e6adb176c06efbc982536988ca8728ab152c4ce943b1423bcf83d7e6ffe4fd5
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'cctraff.ru'. The document body, though heavily obfuscated, contains a URL that appears to be part of this redirection scheme. The presence of a large number of external PDF links further suggests a link farm or redirection tactic.

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://cctraff.ru/123?keyword=counting+atoms+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393016/normal_5f94f7c08bbf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380076/normal_5f8fd35ce5004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f8ce4a9afc70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f909e3dd4225.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5f9a51086dca3.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/vexed_fefeberudelu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5f96f119aef94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f8de4b8e5bf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_5f984f52ed834.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://uploads.strikinglycdn.com/files/6a7a902d-41cd-44cb-920d-95f6534d8668/tanodig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3925/9286/files/a_letter_from_heaven_funeral_poem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0599/6966/files/navodidinageneles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a11434f-4e5d-47f5-91f4-1abf30314313/school_safety_agent_practice_test_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4264b87-e8ed-4ff2-9c27-c81b3d5f5e3b/volilekajilekol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaeb0d7f-4dc8-4d97-986e-c8bfbd7864c5/nixon_gold_watch_green_face.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad85323c-2549-4857-8065-bbe34e7f9a50/22674376966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f4dc9f-6ba6-49a6-a908-2580ddd5b450/diferencia_entre_navegador_y_buscador_en_informatica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b720f27-fac5-44b2-8d33-442f5ca2843f/organigrama_del_departamento_de_ama_de_llaves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7874a5c0-afee-44bd-8be1-bebb294247aa/75270706740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8ba2de-9a13-4212-9140-cd88743f1026/22664145355.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_off00006727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6727 5128 bytes
SHA-256: 5b029a758ac0e59541184d4a87826963e674b4995ed9e65ed6723d59d3cbcb2c
font_01_sfnt_off0000787f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x787F 9892 bytes
SHA-256: 62c90cf9012d80d0c45c449f28bd81b890af14216c951f9a1b4a9e184802ab77
font_02_sfnt_off00009a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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