Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6cc73c8f62a2326…

MALICIOUS

PDF

65.8 KB Created: 2020-08-16 20:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4d6af8bc6be9f7cd6f683a11ac1d7b3 SHA-1: d529c7d995cd018b811b608f6c5db5d92cf60ce3 SHA-256: e6cc73c8f62a2326ccddf65ca63524af0cd6eb1449c70c5e1f42e717e54aa2c7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=desired+capabilities+in+appium+for+android+example'. Additionally, another critical heuristic indicates a PDF link farm with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0431/8589/7627/files/22738954692.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirect URL, reinforcing the malicious intent.

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=desired+capabilities+in+appium+for+android+example
    • http://xubereb.gregstarnesauthor.com/uploads/1/3/0/7/130775934/xonejon_zuwifivumimo.pdf
    • http://files.americasyouthsports.com/uploads/1/3/0/9/130969942/03af2e774e4fc3.pdf
    • http://files.blue-sky-coach.com/uploads/1/3/0/9/130969936/816135.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/22738954692.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/pace_4111n_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7495/files/daferozematixin.pdf
    • https://cdn.shopify.com/s/files/1/0434/5525/0598/files/56214018312.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/java_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/wadajidili.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/acta_constitutiva_de_una_empresa_constructora.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/46780829000.pdf
    • https://cdn.shopify.com/s/files/1/0438/0160/8353/files/digorovilefunuzip.pdf
    • https://cdn.shopify.com/s/files/1/0433/8348/8679/files/entrepreneurship_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0433/3957/9546/files/cours_fusion_absorption.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0133/files/mafatexi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/7430388408.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afea.bin
b7beea15d7450b673ebcae86186be49d30a9c2489296c49d25a3ee729760aa31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFEA 5392 bytes
font_01_sfnt_off0000c21b.bin
56778f6952124e82caaa61bf8ae385374d5121d50cc5b7c33a71d29830f9dc8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC21B 12640 bytes
font_02_sfnt_off0000eb44.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB44 4324 bytes

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