Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb76416faa912a2…

MALICIOUS

PDF

43.0 KB Created: 2020-08-22 22:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09005c32581fb453b7a573c0ef0dcb7b SHA-1: fac49fbdf332c444a141870441b21ebc7aeed978 SHA-256: 9fb76416faa912a2f9c8dc8da8d676a45a12a8811eba5a66ea87d9a46a5b8b5e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for an annual report. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL suggests an attempt to lead the user to a malicious site.

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=hitech+group+australia+annual+report
    • http://mirolugi.zoharpainting.com/uploads/1/3/0/8/130813612/koxusaberivori_gegapan.pdf
    • http://files.newfiremusic.com/uploads/1/3/1/1/131163851/d294e685.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/47668188930.pdf
    • https://cdn.shopify.com/s/files/1/0428/6968/6431/files/25719178510.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/wedoratezirubabatokez.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/30958880126.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/midolufote.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/prince_of_persia_psp.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/template_cv_format_word_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/wozalulakesuzaxotaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/8148/1884/files/rojojimunowizededezex.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fc8.bin
0def6e5fb5f96e633dcdcd09b5c3797b3e92cf94c8bbd8db130bb1efc99c8ab9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC8 5156 bytes
font_01_sfnt_off0000714b.bin
b5dfe2f091e2b5b7a68f676d7ea5e5f04c12077edfb8c421c67a758231ff1213		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714B 14724 bytes

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