Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c920cf91104f03…

MALICIOUS

PDF

51.2 KB Created: 2020-08-26 12:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87c60f1c378779625a6a991970a8f59c SHA-1: fdc13ca6c1e3f19547121e89deb6b6d3e4ee6bc8 SHA-256: 69c920cf91104f03191f9350ea380e8c474ef4776812d01b4b3425fa7f4ac564
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one prominent link identified as a malicious redirector. The document body, though heavily obfuscated, contains the text 'Agostinho de hipona em pdf' and the malicious URL, suggesting a lure to a malicious site. The presence of many links, including to Shopify, indicates a link farm strategy to obscure the malicious destination.

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=agostinho+de+hipona+em+pdf
    • http://kivino.deerhazel.com/uploads/1/3/1/3/131384260/jamegub-gezozikaxasivum-fuwaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/6071/9779/files/37422465461.pdf
    • https://cdn.shopify.com/s/files/1/0429/3695/9139/files/dinutimowotiwutugonedujiz.pdf
    • https://cdn.shopify.com/s/files/1/0445/7358/9663/files/lamellar_ichthyosis_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3051/0742/files/apache_cassandra_definitive_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/9002/5375/files/information_about_bhutia_tribe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8593/files/access_control_security.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/free_chessbase_9.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3251/files/barry_cunliffe_the_ancient_celts.pdf
    • https://cdn.shopify.com/s/files/1/0433/6641/6549/files/16017455853.pdf
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/10546044847.pdf
    • https://cdn.shopify.com/s/files/1/0433/3528/6943/files/diguwike.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2034/files/transformers_age_of_extinction_imax_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/2548548186.pdf
    • https://cdn.shopify.com/s/files/1/0439/1452/6888/files/brother_andrew_god_s_secret_agent.pdf
    • https://cdn.shopify.com/s/files/1/0428/3616/4774/files/amazon_underground_apk.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_off00008585.bin
db5cfb49254b207bf223afe428bc90a05166db7d0d385e7e8b0d327468bd17cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8585 5316 bytes
font_01_sfnt_off00009777.bin
6efb5b748dc039f1fc1e5dcbe009af151abaa1c4a48ca584eb85f349ca7564ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9777 12836 bytes

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