Malicious PDF — malware analysis report

Static analysis result for SHA-256 10236ff824b9dc36…

MALICIOUS

PDF

37.2 KB Created: 2020-08-19 17:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e0af1e213d1043967ed9ad9e9bc27c8 SHA-1: 19259829ad87247dd4c7ec7afb8efe813edfb2fa SHA-256: 10236ff824b9dc36d86a25a49069b5c8eb24714558ce03b29f322aa98c13568f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=dokumen+andalalin+pdf', is identified as a known malicious redirector. This suggests the document is part of a link farm designed to distribute malicious content or phish users. 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.ru/pify?keyword=dokumen+andalalin+pdf
    • http://files.sltpolice.org/uploads/1/3/0/9/130968996/6920386.pdf
    • http://files.historicwestheight.org/uploads/1/3/2/7/132741110/wonujapetad-gimijisetikuda-kobamavu-letinilokitabox.pdf
    • http://zezudife.ukprestigeproducts.com/uploads/1/3/1/0/131070382/gezubuk-tavodagojaze-rofositakuri-powinawurotu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4224/2709/files/39468696560.pdf
    • https://cdn.shopify.com/s/files/1/0433/4659/1903/files/career_paths_law_book_1.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/antidiabetic_activity_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/kanunizesuxivoner.pdf
    • https://cdn.shopify.com/s/files/1/0431/0361/7173/files/bubotupobomup.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4861/files/xapabilegexofixes.pdf
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/fesimuboj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5997/0202/files/kororoporixosufur.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3576/files/schindler_s_list_main_theme_piano.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/68501626419.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_off00005604.bin
e5fd933b3fd584d71994d95b7a576c3362078436d49f54f0ef8f8acfc565ebbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x5604 4976 bytes
font_01_sfnt_off000066e8.bin
08f802af8e380938b0d18ebe2a17a29832d492d065fe2c4ec10d2a5389adbafc
pdf-font-stream PDF embedded font (sfnt) at offset 0x66E8 9808 bytes