Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed050bbaa51be7e2…

MALICIOUS

PDF

44.3 KB Created: 2020-08-19 14:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 88d44198e2557d85d8e82b4bfbe60866 SHA-1: 2354995186c9592c49d2d20007fb979aa51ddfec SHA-256: ed050bbaa51be7e29c3674017d3125205738bb9ea67e368b7f645b900f6e5073
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, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains URLs that are part of a link farm, suggesting an attempt to drive traffic to malicious sites. The ML_NYX_PDF_MALICIOUS flag further supports the malicious nature of the file.

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.cc/pify?keyword=game+of+thrones+2cellos+sheet+music In PDF document text
    • http://files.evaadorned.com/uploads/1/3/1/6/131607163/3792001.pdfIn PDF document text
    • http://fobukedaj.segadoaudio.com/uploads/1/3/1/4/131407435/ropifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4388/0093/files/puzekafujonaliwuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6406/5188/files/razipovegafitejod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/6395846813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/mofudexuwuropabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/17472317711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43181801848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81274949660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/99696931740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6501/1352/files/holland_code_questionnaire.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A26 5284 bytes
SHA-256: 4f1bd81659baf196cc8b1dc548eae752df934ed3dbf3b41271177c1d13a866d8
font_01_sfnt_off00006bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF8 10012 bytes
SHA-256: e973903021b74d5cb90c44c510dd9dbe7c2f46e57b422128e007dfec96947bea
font_02_sfnt_off00008e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E7F 16376 bytes
SHA-256: 760a9d3727253f25105bb1fc64edf994238303adea0153ebc8498db2c5f4fef1

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