Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ea24cc3eea7e54…

MALICIOUS

PDF

46.5 KB Created: 2020-07-11 16:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f117452ba9abd2ba7ba1f1e4d17931f SHA-1: e2fb79309baa442af32c380df6f051ce91620ecf SHA-256: 78ea24cc3eea7e5429d0a0bf66c64c1886f46bf71ff4fe937550ba4ddb040780
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the ultimate destination. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack.

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=game+of+thrones+season+1+episode+4+s
    • http://files.gtc-elite.org/uploads/1/3/2/6/132682570/netefikuvuboz_fifajog_jubakafa.pdf
    • http://files.wheretonext-explore.com/uploads/1/3/1/4/131406855/fuderekujonefenugulu.pdf
    • http://files.infinityscarvesbyjanet.com/uploads/1/3/1/8/131871439/c8473.pdf
    • http://files.pamperedpetsbda.com/uploads/1/3/1/4/131406391/6473580.pdf
    • http://files.3daudiosense.com/uploads/1/3/0/9/130970001/pixazazipul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/55525766755.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakorijupomimenupe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunazazaxukatokezidabu.pdf
    • https://gosefapeb.files.wordpress.com/2020/07/xunowifisivewok.pdf
    • https://juzorikum.files.wordpress.com/2020/06/zafidoru.pdf
    • https://wididoripelo.files.wordpress.com/2020/06/28131485583.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovaje.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/61115171336.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/vepufune.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/dumaxosur.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/simixebirege.pdf
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/22598323912.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewefezagabujam.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3267/files/9231428536.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87277754858.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_off000078ce.bin
af5ae7188a69f353964c199ac389dca83cafea5f6e962f600353a5163b49d695		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78CE 5208 bytes
font_01_sfnt_off00008a67.bin
16446d83e13b751a8e5717c537b1b3b29b5ba840610a6cbfffd73a1429af9053		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A67 10100 bytes

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