Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebc998da0a00b9f…

MALICIOUS

PDF

51.7 KB Created: 2020-08-09 03:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ab38db60204cf35efb7f7751c098741 SHA-1: f40b234c2f22f29fa0a6ca07d208bd14fea3c7c2 SHA-256: 6ebc998da0a00b9f95d6185cb61188d5de3c8c8c5117ee08f10327c7e0a4e0f0
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to HTML to PDF conversion and references the malicious URL, suggesting a lure to a scam or phishing site. 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.cc/pify?keyword=convert+html+to+pdf+laravel+5.+5
    • http://files.flogrips.com/uploads/1/3/0/9/130969742/jefigezebo-wuwagunolotupim-sinasu.pdf
    • http://zesud.placesbeyondwords.com/uploads/1/3/1/6/131637814/rimixikireko_zidekuwutobofo_zilofidisanof_jupatutubijufok.pdf
    • http://files.pcbudgetsolutions.com/uploads/1/3/0/7/130740212/zenakefogimat-patofukav-kokotamudut-domukero.pdf
    • http://files.mission520.com/uploads/1/3/0/8/130873979/relubasubavesavatowu.pdf
    • http://files.musicala.org/uploads/1/3/0/9/130969551/jelomabowaz-vesigoj-livovelikekefiv-wewuzavo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/integral_calculus_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/3837/5074/files/sindrome_cardio_hepatico.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/36833382043.pdf
    • https://cdn.shopify.com/s/files/1/0433/2155/7147/files/sivuvep.pdf
    • https://cdn.shopify.com/s/files/1/0430/3391/9645/files/dofakuwovetaruse.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/22618293109.pdf
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/zenagumenijofigu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/pdf_catecismo_catolico.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/fafidaxoderog.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2122/files/51543699000.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/95849742042.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/accountancy_comprehensive_project_for_class_11_cbse_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5024/6054/files/introductory_mathematical_analysis_for_business_economics_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/juvoli.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3267/files/90289247061.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008393.bin
dd624636043c6c1864671060a9003322e287acb1d4c4c6983b1bb10a5b87e1d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8393 5224 bytes
font_01_sfnt_off00009539.bin
288f2a49d5fa1540406d0b579fdafa7bdaa00b6e00615857301cb9ba81e73445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9539 13664 bytes

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