Malicious PDF — malware analysis report

Static analysis result for SHA-256 04010a8dca990346…

MALICIOUS

PDF

35.4 KB Created: 2020-08-12 06:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22416ca88e8bf1b25d2a40da4d49160d SHA-1: 151e769cef8d4de6ebbea557a760619acffbe0c6 SHA-256: 04010a8dca9903463d5e587065ffec49b852fee807a4b1a37842884386e31606
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to improve search engine ranking for specific keywords, likely to attract victims. The primary malicious URL identified is ttraff.com, which redirects to a search query for 'medical cell biology pdf free download', indicating a lure to download potentially harmful content.

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/wb?keyword=medical%20cell%20biology%20pdf%20free%20download
    • http://files.mooneevalleymagazine.com.au/uploads/1/3/0/7/130739690/1335634.pdf
    • http://files.gbartistsassociation.com/uploads/1/3/1/4/131438163/gowezisowolemedi.pdf
    • http://jijapedel.armsstrong.com/uploads/1/3/2/6/132681579/fakesajof.pdf
    • http://files.mygentlebeginnings.com/uploads/1/3/1/4/131453456/7332417.pdf
    • http://files.thebdayproject.com/uploads/1/3/1/6/131637631/6018d3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/butterfly_valve_with_pneumatic_actuator.pdf
    • https://cdn.shopify.com/s/files/1/0440/4104/4118/files/diccionario_biblico_reina_valera_1960_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8036/files/zujasagawoxizujuwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9308/9692/files/12498934690.pdf
    • https://cdn.shopify.com/s/files/1/0436/4215/9257/files/69544857839.pdf
    • https://cdn.shopify.com/s/files/1/0433/2234/3577/files/hernia_inguinal_seram.pdf
    • https://cdn.shopify.com/s/files/1/0440/6594/7800/files/nawulekaparakumez.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3455/files/bofafatusexuresojepejav.pdf
    • https://cdn.shopify.com/s/files/1/0433/8132/5987/files/dokabojufiripegaj.pdf
    • https://cdn.shopify.com/s/files/1/0451/8828/4565/files/neonatal_hyperbilirubinemia_aap.pdf
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/savur.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3170/files/13854242853.pdf
    • https://cdn.shopify.com/s/files/1/0448/4520/3618/files/advanced_financial_accounting_8th_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/48100822353.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_off00004d44.bin
c24f0076e5d3c0242dd74e01587c76b594d693728c90fca4b3bc78b58b7d4cb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D44 5484 bytes
font_01_sfnt_off0000600b.bin
6b629e9ff74d5608be6b669785c87b206773450b14e743ebc60181b4f5d48586		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600B 9584 bytes

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