Malicious PDF — malware analysis report

Static analysis result for SHA-256 79eaeadbb9e7b6e0…

MALICIOUS

PDF

58.2 KB Created: 2020-09-02 06:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9f85e348c5ff146a563d076e112afe3f SHA-1: bd94e3c661861566a12a1bd957bc896b83140d8d SHA-256: 79eaeadbb9e7b6e087ba55ae2763c62f57d7148ba7689245722431fa967e0fae
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links directs to a known malicious redirector, suggesting an attempt to lead the user to malicious content. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector, indicating a deliberate attempt to lure users to potentially harmful 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.com/pify?keyword=bad+words+in+english+with+meaning+pdf In 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/1/0433/7028/3166/files/pofizenekaredun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5381/7762/files/13169173173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9449/8709/files/dimensiones_de_la_calidad_de_vida_laboral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1726/3510/files/algebra_1_final_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/wikovelupetotamofotasexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/sujet_type_bac_maths_terminale_s.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0890/7688/files/addition_and_subtraction_decimals_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9712/9109/files/21168844797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2452/3170/files/tu_poeta_alex_campos.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_off00009929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9929 5596 bytes
SHA-256: 0f3736fcaba072dbd98af2fc49006ce90d54312dad4232369d19f7005865e62d
font_01_sfnt_off0000ac12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC12 2536 bytes
SHA-256: 0afedbd260105631821a0d5f379364035fef08d4a0bc50cf0bf57899f8f8bd91
font_02_sfnt_off0000b6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6FD 10900 bytes
SHA-256: 09d687278048f6565a7ad711b8a2914761d2b8561da54f8834b354bbd63823ea

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