Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d115e90546d294d…

MALICIOUS

PDF

55.7 KB Created: 2020-08-11 23:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88da4d7e62ee13a494c7ddaba004bb8c SHA-1: c45a73c71454b1ac9dc142179b71ac748b4b3c6c SHA-256: 7d115e90546d294de923f28d044f9f6477bc742609e73c1708758ad12a829d8c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains URLs that likely lead to further malicious content or phishing pages. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to redirect users to harmful sites.

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=acta+constitutiva+pdf+formato
    • http://files.meady.com/uploads/1/3/2/6/132695465/2089613.pdf
    • http://kibupir.epworthumclouisville.com/uploads/1/3/1/4/131453574/veliwemoke-lasuvewovis.pdf
    • http://files.agilecreators.com/uploads/1/3/0/8/130874361/dfa3e0c9c.pdf
    • http://files.cedarcreekinternalmedicine.com/uploads/1/3/0/7/130739239/xuxorub-zaval-limomawakiro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7921/8840/files/63061507788.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/79833445990.pdf
    • https://cdn.shopify.com/s/files/1/0435/8111/2483/files/setiperogepo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/donirorotezolamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4071/0562/files/strength_of_materials_multiple_choice_questions.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/modern_business_process_automation.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/xikabo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2893/7880/files/ipomoea_aquatica.pdf
    • https://cdn.shopify.com/s/files/1/0436/0673/7053/files/ahmadou_kourouma_les_soleils_des_indpendances.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6903/files/pujopoxibakatojidireje.pdf
    • https://cdn.shopify.com/s/files/1/0431/7993/3862/files/94787080551.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/92360024442.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_off000095c9.bin
cdbe38d94a6db8f39aab0b8aa3df6a4f1674e085c73e95e218f9a12fddbc7e4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95C9 5316 bytes
font_01_sfnt_off0000a7c9.bin
f85641659b4b9a085b52523c2efdc07af23a86a4f649a81b5fc7311e3491340c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7C9 13164 bytes

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