Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9ea71da62b6990…

MALICIOUS

PDF

39.8 KB Created: 2020-08-25 11:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 694c80912378583ba56e7cc023b22bd5 SHA-1: 34099688263f626f3824d948466022eebabf0b44 SHA-256: 6a9ea71da62b69901d8e9e6d86177a2a72f247e4734dc08d3d68a3553a80ae82
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The ML classifier strongly flagged this PDF as malicious, suggesting it's designed to redirect users to harmful 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.com/pify?keyword=akashic+records+pdf+free
    • http://xodurej.thegerberdaisies.com/uploads/1/3/0/7/130776688/mipuwub_vexusukadexe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0714/8185/files/pdf_architect_pop_up.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/adonis_ratio.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3651/files/kulogi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3829/files/michelin_guide_sf_2019_bib_gourmand.pdf
    • https://cdn.shopify.com/s/files/1/0436/9586/6010/files/jivolevirowegarazoxej.pdf
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/angielski_w_tumaczeniach_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/7992/files/mezibezunoted.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7894/files/femef.pdf
    • https://cdn.shopify.com/s/files/1/0431/0777/8711/files/amulya_herbs_business_plan.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_off00005d88.bin
316aef22cc3281a42229925156a057820f468f9b12faef46ea4ecd504f33f975		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D88 5264 bytes
font_01_sfnt_off00006f5a.bin
f78e08e927d5f5220ef0be14204cd3b0188f136c219389fc3120c57c4b595c54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5A 10488 bytes

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