Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f44a2fbdef533d…

MALICIOUS

PDF

64.8 KB Created: 2020-08-06 07:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48eddd6789ccafdb133c673ab9e6e425 SHA-1: 5dde36a1dad68d3d5506a58b7e94d0626289d9de SHA-256: 11f44a2fbdef533d899d8687a9989225e49b36cdd32e64d7e72a2804333f6279
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The embedded URL https://ttraff.cc/wb?keyword=empresas%20publicas%20en%20bolivia%20pdf is a primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest an attempt to lure users to malicious sites, likely as part of a phishing or scam campaign.

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/wb?keyword=empresas%20publicas%20en%20bolivia%20pdf
    • http://files.leximayde.com/uploads/1/3/2/7/132740845/xumilivalosoze.pdf
    • http://files.partybartendersandwaiters.com/uploads/1/3/2/7/132710679/95945538f19.pdf
    • http://gadevu.thesurreysaddlery.com/uploads/1/3/1/4/131438464/a498eaae.pdf
    • http://files.zmagazine.co/uploads/1/3/1/3/131380058/musiwaxupazuf_bonipikuleme_fumadi.pdf
    • http://files.frankfordchargers.org/uploads/1/3/2/7/132740439/boxagemox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/gamezo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6663/files/99305649286.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/vibariwukibugul.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/croix_kabbalistique.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/55139088823.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/91128025827.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/jibokokipidibomireriz.pdf
    • https://cdn.shopify.com/s/files/1/0437/5629/0206/files/burket_oral_medicine_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/9367/1588/files/6474024953.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/virajibuxuriwov.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/67363016368.pdf
    • https://cdn.shopify.com/s/files/1/0438/2919/8998/files/automate_the_boring_stuff_with_python_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29942388251.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_off0000bbb2.bin
d9ce56e29ce1eb3399d2c1f3994fbdce7ba6f604a203c93551a53b7562781300		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB2 5456 bytes
font_01_sfnt_off0000ce2d.bin
f51151bdd3d38c7f1d2191bd70cb47b7e5a07446e0a48446f73b5ad96038c34b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2D 11724 bytes

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