Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d5e58c51d8f132…

MALICIOUS

PDF

42.1 KB Created: 2020-08-02 14:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbd7b9b8edd2a6895144402bf4de7b22 SHA-1: a1ac86ded4fb17f7df8831ea06fe327dd096dd73 SHA-256: 88d5e58c51d8f1327176e574c7568b490b468dadc3014a1057745373e5020367
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=pokemon+explorers+of+sky+quiz', is designed to redirect users to potentially harmful content. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to PDF files, suggesting an attempt to manipulate search engine results or distribute further malicious content.

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.cc/pify?keyword=pokemon+explorers+of+sky+quiz
    • http://binoto.truelighthealingcenter.com/uploads/1/3/0/7/130775612/571843.pdf
    • http://files.oneglobalclassroom.com/uploads/1/3/0/7/130775509/lazufinapik.pdf
    • http://files.exchangerjessi.com/uploads/1/3/1/4/131453636/daguriterox.pdf
    • http://files.studiosisu.net/uploads/1/3/1/3/131398347/lapiwalisovoxes.pdf
    • http://files.eveshealth4life.com/uploads/1/3/2/6/132683330/fixitisopotimiwu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/gidatenikokepo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8592/files/11253680799.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/vavimabevisidumukal.pdf
    • https://cdn.shopify.com/s/files/1/0432/7584/5792/files/nejer.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0474/files/figobakolijilolelojamibot.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6345/files/bofoxagebitalupefedu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/disemovavabekekokob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xatet.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/kotudaxot.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/lifimu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3749/8276/files/1259949741.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_off000064cf.bin
f5c7a577f360011c9fa0b1357074ad3228a9df733afc2fa06ea7011bc0c62046		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CF 5248 bytes
font_01_sfnt_off000076b6.bin
8e298d97ae4c51542ca3f35d1495ce0f9fdec5c2d8d98d87fad2303113210191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B6 10496 bytes

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