Malicious PDF — malware analysis report

Static analysis result for SHA-256 8083683715f6ce41…

MALICIOUS

PDF

39.5 KB Created: 2020-09-02 11:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08fce3d22484527500abd410cf95a85c SHA-1: d98374d13ae2c9b935d33278b4333576270f50f4 SHA-256: 8083683715f6ce415567531f039506ee3a9c8b0aa7517ce00035d155da785a28
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a malicious domain, disguised as nutritional information. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies the primary malicious URL. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, many pointing to benign Shopify URLs, likely to obscure the malicious redirector. The ML classifier strongly flags this PDF as malicious.

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.club/wix?keyword=mcdonalds+breakfast+menu+nutritional+information
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/tenazoworoxofi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/kalibesanupovujirow.pdf
    • https://cdn.shopify.com/s/files/1/0436/4409/2566/files/vaali_ajith_songs_isaimini.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7618/files/vakijoxufi.pdf
    • https://cdn.shopify.com/s/files/1/0457/7545/4374/files/crash_report_codes.pdf
    • https://cdn.shopify.com/s/files/1/0439/0263/2104/files/que_es_el_trastorno_de_asperger_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0429/3636/9318/files/57326831530.pdf
    • https://cdn.shopify.com/s/files/1/0449/3407/0440/files/wevipanuzakuboduveridon.pdf
    • https://cdn.shopify.com/s/files/1/0431/2865/1938/files/matrix_hair_color_chart.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/demivagekibezuxex.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/43523588414.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/35863974845.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0434/2261/3655/files/boboiboy_galaxy_run_mod_apk_apptoko.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_off00005bf3.bin
6a3b90642f9eefa4a4d03bfe047d8c22eb2dbc98c806b0f4a612f417542567ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF3 5376 bytes
font_01_sfnt_off00006e35.bin
e997678d19dc027e423cef3731fdeef92caba9745f59ad64b14ee8335de6eee6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E35 10196 bytes