Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aaa52f0cb53f5e9…

MALICIOUS

PDF

47.3 KB Created: 2020-07-28 17:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22144376c9c8819c0d9d3aa9d188fe5d SHA-1: 5361274d53d8a7c20271b3244cc6e0e045dcac07 SHA-256: 6aaa52f0cb53f5e9d06a78a6cd8c0420719ead2cf6e0dc250d6e8d76b6dd769a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or lure users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of 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.ru/pify?keyword=willpower+roy+f+baumeister+pdf
    • http://files.drachenspiel.ca/uploads/1/3/0/9/130969573/803dff98615f.pdf
    • http://files.karenfornes.com/uploads/1/3/1/4/131408928/3ab08af.pdf
    • http://files.arnoldinnovations.ca/uploads/1/3/1/4/131438692/tegukatemabijubib.pdf
    • http://files.rosewriting.com/uploads/1/3/1/4/131410685/2020369.pdf
    • http://files.britinn.at/uploads/1/3/1/4/131453484/5145911.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4368/2469/files/basapidatida.pdf
    • https://cdn.shopify.com/s/files/1/0429/2473/6678/files/sapotugewipu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/63482051081.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3462/files/tevowopubiretexugupadaku.pdf
    • https://cdn.shopify.com/s/files/1/0432/3832/6432/files/loseraxiwug.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/gemudigijoruxazuza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74195332560.pdf
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/zitojimowamugopujageme.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/tifaxeta.pdf
    • https://cdn.shopify.com/s/files/1/0429/2427/7923/files/sopinomukejolonamiza.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/53284297508.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_off00007bbb.bin
82dfa3c81f93b774669d1772b1c532d2f42544da85b78c4110b4fa5222692e13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBB 5308 bytes
font_01_sfnt_off00008dd7.bin
2614ae22afdf1da0b7ec7643b2ef2cfce379d1d26123169bf002ddad1dd992f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD7 9992 bytes

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