Malicious PDF — malware analysis report

Static analysis result for SHA-256 d568958940b9f5f9…

MALICIOUS

PDF

45.0 KB Created: 2020-10-15 21:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 038304d060c79b0fdf073c917ada3bec SHA-1: ef79da59cb789ec93805e70636b5b2b429defe9b SHA-256: d568958940b9f5f9c2859612a57b353596f6b366fdf21d321f2e32208b71db66
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, forming a link farm, with the primary malicious URL being a redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/pify?keyword=hide+numeric+keyboard+android', which is also flagged by heuristics as a malicious redirector. The presence of numerous links suggests an attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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.club/pify?keyword=hide+numeric+keyboard+android In PDF document text
    • https://site-1048190.mozfiles.com/files/1048190/nejuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f88793e4317e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f87382f4473c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f882cc62997c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f873ffabee49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f87d6782bb28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b2cc59d-4237-493a-8081-fba705ce6074/nifuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/012a83e7-7a8f-4331-858d-5443154162ec/13577788870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ef5700-5ec7-47d2-b71d-554bc68cacaa/jisigonisefekal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf24d61-7040-4d81-bbe5-97487ad90a13/80622282443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8732/2522/files/wunenuvomujesetesuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2953/1293/files/romegodukati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5625/0013/files/supply_chain_management_quiz_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7782/3400/files/tipos_de_cableado_estructurado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7903/1712/files/26121645187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/397fc91d-6331-4a4e-9042-d966a337983c/deduzipugudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea2edc4a-8981-4a72-bf27-f7770f461f15/mizozikepimevozilipeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3563fef4-939e-44e2-8899-25e5162c23e1/98971778842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/411209ee-48c3-44f0-9710-00d71cc63bbc/zakoguronebabeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86d07471-3f05-4bc0-adaa-08400cdfb527/moler.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7157 5144 bytes
SHA-256: 05a4e7499001dd43d96d69fdaf43dcce9c858cf40bd2d8c4ce848cc28a835e0f
font_01_sfnt_off000082ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AE 10720 bytes
SHA-256: b5ec7e2088be60f87ef0a0670fa7448b9da2735c7e1130ac4431db306084f8b2

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