Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ceae098bf40b5b3…

MALICIOUS

PDF

40.0 KB Created: 2020-08-19 05:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3268193920034a1b10fb7eb5a7239fb SHA-1: 0f9cae53bbb1e6205036836cae98f134e3d7cf49 SHA-256: 5ceae098bf40b5b398a9d7767d996bd3ae50d941e1f1908a23f8f6ad167e574c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=add+gif+to+text+message+android', which is flagged as malicious. This suggests the document is part of a link farm or SEO poisoning campaign designed to redirect users to malicious sites.

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/pify?keyword=add+gif+to+text+message+android
    • http://zazenin.cmusclt.org/uploads/1/3/1/8/131856022/mezexuvir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/61074072107.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3018/files/12811645696.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0435/files/advanced_excel_course_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/1282/3967/files/53932446414.pdf
    • https://cdn.shopify.com/s/files/1/0439/9969/0910/files/novipebilit.pdf
    • https://cdn.shopify.com/s/files/1/0431/9828/3940/files/argentina_economic_crisis.pdf
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/pdf_to_word_download_program.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/30905840713.pdf
    • https://cdn.shopify.com/s/files/1/0435/3402/4855/files/bypass_excel_spreadsheet_password_by_vba_code.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9762/files/75251041794.pdf
    • https://cdn.shopify.com/s/files/1/0437/2581/5959/files/37222916000.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3291/files/48664046692.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_off00005e4e.bin
9c909d3d6eb05b0ab44ebd8bc654d201783f3ba5d14dcd31fef827b5d259614a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4E 5252 bytes
font_01_sfnt_off00007015.bin
6dd19e3d1af0792b5475fd0c36b56302874eb296b72b528616f63e51e02360ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x7015 10304 bytes