Malicious PDF — malware analysis report

Static analysis result for SHA-256 73ee175caf96738e…

MALICIOUS

PDF

37.2 KB Created: 2020-08-01 08:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 060079480ab3c62931370fcaff444d18 SHA-1: cd13c77c0f1ea4b1b677a965af65701636790460 SHA-256: 73ee175caf96738e2ac15d790296591a4269d237004bfcb8d144e2f63720efff
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=direct+path+tv', which is flagged as malicious. The presence of numerous links suggests an attempt to manipulate search engine results or lead users to malicious 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.ru/pify?keyword=direct+path+tv
    • http://files.mnvetsoutdoors.org/uploads/1/3/1/4/131408572/lenegudut_xevofokofubo.pdf
    • http://files.lemoyne.org/uploads/1/3/1/4/131454207/xudixasidata-bezek-dewerabanebo.pdf
    • http://files.missspic.com/uploads/1/3/0/8/130873717/699ffeea254c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9033/7174/files/57437999799.pdf
    • https://cdn.shopify.com/s/files/1/0428/7148/8668/files/51680247199.pdf
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/limukuratuteroliraxafowex.pdf
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/4147900587.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/91069333400.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/46338071220.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/mukomobiverijagisamib.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3062/files/introduction_to_operations_research_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/jedofadasakop.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/82980765930.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/40563848860.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/24868593499.pdf
    • https://cdn.shopify.com/s/files/1/0429/1218/6531/files/90723771522.pdf
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/bugarekasamuvukupo.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_off00004eac.bin
bf2e1d99f609438959beaa536ee0dcbc25f9cb0c965943ff2d6648d58781ede2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EAC 4872 bytes
font_01_sfnt_off00005f45.bin
c003899f235009ec99a5d6539b721136402ca50d53acdda72fc4895413a6afd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F45 13092 bytes

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