Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bab50fb9097186f…

MALICIOUS

PDF

55.6 KB Created: 2020-09-13 13:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 672c67ea5f1e12543df52d94b5d09db9 SHA-1: 44df32569f8ca077ab103448d2d3565242d6ac7e SHA-256: 9bab50fb9097186fbaff8b278fc0514c458c945d298126135871b1ad1aba8b83
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL associated with a keyword search that appears to be part of an SEO link farm. The document body, though heavily obfuscated, contains the same URL. This suggests the PDF is designed to drive traffic to malicious sites, potentially for phishing or malware distribution.

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=candy+apples+dance+studio+phone+number In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/ace02d_0280356ea79a4a45addb219ec04886b4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e4a001_eb491398f85446b4a502b8004d8ca251.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/735189_e4b5ef98d368461cbdbb1de1a7cdd6d3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d1fcfc_83e02fe5b1c944ff8237d042b4658b19.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/704566_e5651c0d11324b0ebd83d5dc6f134039.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0dd040_5c80dcc947454e369c3d451c648b7ff8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/15ebe2_2be5301fe03d4e44b50588226b0d88df.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7d21c0_ba5c2f77050c4b5a987e932ee02969fe.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7d2910_c84ec4c17dbe4910b08504444c986b17.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a0905b_c015ae836708411ca9c30694cb873072.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fbcb80_23e6d55772ca42868da5e72fe583c857.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2b25b5_62702eb3dd054c3e803a14cc6850cc9d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d01287_ccdeafb97f3c49508f84251b96410eb6.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8B 5460 bytes
SHA-256: c310ad58e0025fc48ed3b70b437ebdfe3e751506448bcb14efa5372b1ab5280c
font_01_sfnt_off0000a0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0E9 1880 bytes
SHA-256: 966106b28ae8f1330d826459814e5055f6d81c3513c9841a50410ef819790710
font_02_sfnt_off0000aa00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA00 11836 bytes
SHA-256: 6111730b21e9d1a1dcaf26ce6cf1b39c22acc67232aa966754dadfdedf8675cc

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