Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d4007c09c0d1df8…

MALICIOUS

PDF

35.7 KB Created: 2020-08-15 02:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a221b8e778de61515b6467956c424235 SHA-1: cdf012995028a1845cad0b56d94bb9410926a66f SHA-256: 4d4007c09c0d1df85e4ae3f91a5e12c2da94166825b59499270f989732a7d913
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged as malicious due to a critical heuristic identifying it as a redirector link pointing to known malicious infrastructure. Additionally, it contains a link farm with numerous external PDF links, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute content. The primary malicious URL identified is https://ttraff.com/pify?keyword=alaipayuthey+ringtone++masstamilan, which likely serves as a gateway to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=alaipayuthey+ringtone++masstamilan
    • http://files.kimkirch.com/uploads/1/3/0/7/130738819/e954015d.pdf
    • http://files.radoslawrogoza.com/uploads/1/3/1/3/131384300/nolirujowexeboj_wetased_nedenegojizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/medulatulexikodazo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/31091030894.pdf
    • https://cdn.shopify.com/s/files/1/0435/1701/8267/files/drop_all_tables_sql.pdf
    • https://cdn.shopify.com/s/files/1/0440/8688/6552/files/lufofuxito.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/binur.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0605/files/57700046399.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3669/files/active_directory_domain_services_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0450/9820/5349/files/catalogo_general_de_cuentas.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/index_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/91617579465.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/72199491412.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdf
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/famigetopomabemegaj.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ed9.bin
608eae8f41a538d7e812283b6b662cd0a033f995aa084d5db5463d5f060ce8bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED9 5324 bytes
font_01_sfnt_off000060c7.bin
bea270bd3c3c84f7b665327ca8a465991bd2aead82a50ca777edc734205f1f89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C7 9696 bytes

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