Malicious PDF — malware analysis report

Static analysis result for SHA-256 6caf1a33de86ce8e…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 12:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b36d5eb5a8baf64ab89a3f030d92cb9a SHA-1: b6e6797a71af29d309815db777de42f1e34fdeb8 SHA-256: 6caf1a33de86ce8eba9efa2090a93ccc513f5f7f23c03e6e2793820f99b797e8
154 Risk Score

Malware Insights

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

The PDF document contains a deceptive message related to 'Rivatuner' and includes a link to a malicious redirector. The document also functions as a link farm, pointing to numerous other PDF files hosted on Shopify. This suggests a phishing or scam attempt designed to redirect users to malicious content. No scripts were extracted, but the presence of embedded URLs and the malicious redirector link are strong indicators of malicious intent.

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.ru/wix?keyword=rivatuner+cannot+establish+connectio
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7364/2406/files/html_form_save_to_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/sirumowokisuvopi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/pafejap.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/ronogasoled.pdf
    • https://static.usrfiles.com/ugd/3e5d97_b106c2eb5ff24b76a1baa983328e5e08.pdf
    • https://cdn.shopify.com/s/files/1/0438/0780/1504/files/holt_mcdougal_algebra_1_assessment_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/0797/5317/files/pokemon_glazed_download_gba_roms.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4479/7600/files/pasuzubolosorisikigifuziz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/coordination_chemistry_isomerism.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4103/files/52146234947.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/adductor_strengthening_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotedijulukamani.pdf
    • https://cdn.shopify.com/s/files/1/0428/4078/5062/files/components_of_vocational_guidance.pdf
    • https://cdn.shopify.com/s/files/1/0437/6389/2376/files/10_parmak_f_klavye_program_indir_gezginler_trke.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_off000066a2.bin
e1fc2a2f7d6afe3936a44c8d8ca0bbb5abad68df89d871a9d0988f4707af1025		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A2 5096 bytes
font_01_sfnt_off000077ea.bin
7e2f77c1d0e8b32d5c720a541d4352ab29fc8e9d5ce294be138d361325c68ce2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77EA 10480 bytes

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