Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea8d63dc435b6ac…

MALICIOUS

PDF

42.2 KB Created: 2020-08-11 14:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26587ea74f8714565994dbfa9b30a995 SHA-1: ba8f212f3210d78fc9093e76638a6e15dd69e821 SHA-256: 6ea8d63dc435b6ac5664d9bbe2ee321776a582424ea75a4dcac8484cdf8053f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, with the primary one leading to a known malicious redirector at 'ttraff.com'. This redirector is likely used to obscure the final destination and potentially deliver malware or phishing content. The document body, though heavily obfuscated, contains the same URL, suggesting an intent to drive traffic to malicious infrastructure under the guise of providing a free book download.

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=mathematical+physics+by+rajput+pdf+free+download
    • http://files.iesagency.com/uploads/1/3/0/7/130738741/4977867.pdf
    • http://files.sisterspiritwomensharingspirituality.org/uploads/1/3/2/8/132815154/58853863.pdf
    • http://files.leopardpineapple.com/uploads/1/3/2/8/132815298/zidorezebage_zarilem_vuzezez_vuzanapalavag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0879/3510/files/45421440429.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/battery_charging_circuit.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9764/files/5321000985.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/jovazirobugupazal.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/jiporuzesabewowogamuwem.pdf
    • https://cdn.shopify.com/s/files/1/0440/8334/7606/files/fibras_textiles.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xodujanizovu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3594/1274/files/suves.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/67266214337.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/tipos_de_respiracion_aerobia_y_anaerobia.pdf
    • https://cdn.shopify.com/s/files/1/0429/9387/7145/files/nursing_care_plan_for_postpartum_hemorrhage.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/63300230878.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/83373145504.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_off000061b3.bin
27c890400b3d527863261c829578ad9c4e232f53e948d2640e57c463779809de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B3 5812 bytes
font_01_sfnt_off00007565.bin
f83f0d86dab28c8f89856b6f4a8a0820862be96fd73041937640bedbcb66da67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7565 10620 bytes

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