Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d8a948166601f9…

MALICIOUS

PDF

41.9 KB Created: 2020-08-11 03:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49ce22f060701ef148435c18a86c27d9 SHA-1: 1f283a146f8f2c0f4b1a4b11c9f726034da2c32b SHA-256: 09d8a948166601f910a01afa51c398ae6c0a698be57e95e4ed67f83b092d1886
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to known malicious infrastructure, disguised as a search result for a technical topic. This indicates a phishing or social engineering attempt to redirect the user to a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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=html+tags+definition+and+uses+pdf
    • http://files.libertyhighchoir.org/uploads/1/3/2/3/132302963/salupudonesux.pdf
    • http://files.landonmondragon.com/uploads/1/3/0/7/130740589/2551643.pdf
    • http://files.mimimcp.com/uploads/1/3/0/8/130815664/sukuxokuta-vopewu-bosaku.pdf
    • http://fopokuweb.udistrict.micromemphis.com/uploads/1/3/0/8/130813528/9887006.pdf
    • http://files.largeblackhogofpa.com/uploads/1/3/2/6/132681028/c81104c37a1c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/4582/6205/files/bhagavad_gita_stephen_mitchell_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/napinekojabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/61768931519.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/zuviwukogovut.pdf
    • https://cdn.shopify.com/s/files/1/0431/8003/2160/files/gavobojorekimojaxegawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/screening_of_antianginal_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/jizowa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/33189535030.pdf
    • https://cdn.shopify.com/s/files/1/0440/9583/2216/files/stigma_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/9114/8444/files/1510999809.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0263/files/borewell_recharge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0956/4068/files/weider_pro_7500.pdf
    • https://cdn.shopify.com/s/files/1/0429/7831/2355/files/jozofigajisu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6261/files/gas_masks_of_the_wasteland.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_off000061e4.bin
2821eba08d93d1b930997aff57c12d94d415f173d20018c5bc4f96fed3246b71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E4 5228 bytes
font_01_sfnt_off0000739c.bin
6336f07b157b45d0c9b76653a325a68666cd205a66ef051783e6b630d64505fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x739C 12164 bytes

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