Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad523cd2eb05bff…

MALICIOUS

PDF

46.5 KB Created: 2020-10-26 14:38:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2121e182c65f048ca94f714900c1c1bf SHA-1: 9a50693f00f8b01599d17598c17cbebc272e4375 SHA-256: 5ad523cd2eb05bffd9d50a6eb776271e5eb8182c501d0fabd257b8f85658d61d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.link'. The document body, though heavily obfuscated, contains text suggesting a lure for downloading technical documentation, which aligns with the redirector's keyword. The presence of numerous external PDF links further indicates a link farm or redirection scheme designed to obscure the final malicious destination.

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.link/123?keyword=ashrae+handbook+1997+free+download
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/8b3e0a.pdf
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/3765439.pdf
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/ropisugabujo_pumikaxen_xozikateti.pdf
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/c4c0b877.pdf
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/suxamimewol.pdf
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/maruj.pdf
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/padokoderunej.pdf
    • https://nugemezan.weebly.com/uploads/1/3/4/3/134359438/2b18a0bc25.pdf
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/d1ee3c84.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d31c81a9-5492-4f94-bf18-45a99cbe64d9/52531957117.pdf
    • https://uploads.strikinglycdn.com/files/2db2b399-87c4-4636-81b3-108094179d75/test_de_thurstone_para_imprimir.pdf
    • https://uploads.strikinglycdn.com/files/1d6dd30f-d7ea-4413-bb7b-9a0c6acf655b/31570546697.pdf
    • https://uploads.strikinglycdn.com/files/dd5f2db8-6a9e-4b58-b8fb-f26c1f3d9480/24072571747.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8090/files/66514169870.pdf
    • https://cdn.shopify.com/s/files/1/0450/1169/7814/files/anplagghed_al_cinema_altadefinizione.pdf
    • https://cdn.shopify.com/s/files/1/0481/3262/0441/files/volekefuwemukenix.pdf
    • https://s3.amazonaws.com/davolazupivowi/96219467995.pdf
    • https://s3.amazonaws.com/mijedusovineti/43164837223.pdf
    • https://s3.amazonaws.com/henghuili-files2/kinunudetekol.pdf
    • https://uploads.strikinglycdn.com/files/2b9a273b-d083-4de6-bd7a-d39e85bbb0ab/62927418155.pdf
    • https://uploads.strikinglycdn.com/files/c22d4cb0-3663-4960-99f8-9cc10096fc0f/38849476143.pdf
    • https://uploads.strikinglycdn.com/files/95aec56e-ade9-4dab-8b62-536644e78afa/zipuxijuzuvosotujejeroz.pdf
    • https://uploads.strikinglycdn.com/files/7759f1a5-2f83-4d09-9105-8cf1d6cf916c/sorenomojumawoz.pdf
    • https://uploads.strikinglycdn.com/files/ba580eb8-3dad-46df-a545-13fb49c7468d/bakidiviwiwodilofusis.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_off0000721c.bin
aba1c42bc4c821bc7688b6c6a2215fb8ac90202169844badd00d5032ea5359a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721C 5568 bytes
font_01_sfnt_off00008513.bin
990b990a3cb54ecb7ec2e0f5dea433bc63b8528ecef939d64efe50e4ca984c4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8513 11808 bytes

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