Malicious PDF — malware analysis report

Static analysis result for SHA-256 8461c140f5e38c3c…

MALICIOUS

PDF

47.0 KB Created: 2020-08-08 03:39:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ae72b6497943cb67a3dc94d6102ddfc SHA-1: 2b335444e78f3e42ab5ff2af889835b7af9d5be0 SHA-256: 8461c140f5e38c3cd3c8814ac17a1a27b837175191e05fe95aae8dd9669fcf43
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to a link farm designed to host numerous PDF documents. One of the primary URLs, 'https://ttraff.ru/pify?keyword=botulisme+traitement+pdf', is identified as a malicious redirector. This suggests the document is part of a campaign to drive traffic to malicious infrastructure, likely 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/pify?keyword=botulisme+traitement+pdf
    • http://files.angelhairwiggallery.net/uploads/1/3/2/7/132712006/dapisomopixif.pdf
    • http://files.maelasesthetics.com/uploads/1/3/1/3/131380547/c49e1.pdf
    • http://files.thirdgradegenius.com/uploads/1/3/2/7/132740778/zofagivuwasanivas.pdf
    • http://famaj.lovepuertoricogoldens.org/uploads/1/3/0/7/130738732/4714862.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6413/8651/files/62879427671.pdf
    • https://cdn.shopify.com/s/files/1/0429/4223/4791/files/lizexudulatojuruzezatu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9815/8744/files/65108573894.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/nivorebuvuxajazu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0359/files/mini_international_neuropsychiatric_interview_7._0._2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74535711799.pdf
    • https://cdn.shopify.com/s/files/1/0436/0660/5987/files/57299409985.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/basic_computer_knowledge_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/jinemisulomujasabiwub.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/63813194320.pdf
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/mesuvufunesexawupere.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/5200005237.pdf
    • https://cdn.shopify.com/s/files/1/0437/6359/7466/files/febojogunat.pdf
    • https://cdn.shopify.com/s/files/1/0433/4711/6197/files/luwodevabugumupukorenij.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_off00007714.bin
d7d80d5449154bbee060ab2b211b6da411a03ef1d858af3aa35132b797bffc94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7714 5236 bytes
font_01_sfnt_off000088ca.bin
79579b8394b7bccb784981992acf69cb2a2444e9b37273438465fb78a4cb0213		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88CA 11960 bytes

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