Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f6d9f083de8c63…

MALICIOUS

PDF

64.0 KB Created: 2020-08-08 22:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a09dbe7d7a926a6fb5be79f0de5f32a SHA-1: 80fa8a426712af403ea77334776ffdb6961fcf3b SHA-256: 20f6d9f083de8c6333a114ebf1dd641f1069f55b3576658d31229876be2f081c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL. The ML classifier strongly indicates maliciousness, and the PDF structure suggests a link farm designed for SEO manipulation to distribute malicious content.

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=characterization+of+nanoparticles+pdf
    • http://wegukuloz.christianhartsough.com/uploads/1/3/1/4/131454065/tamuwowow-toxer-xivakizaf.pdf
    • http://files.gdioneducator.com/uploads/1/3/1/6/131606202/mineradugaluge.pdf
    • http://files.guardiantraining.co.uk/uploads/1/3/1/4/131438180/nebikosoru_junelo_jonejizig.pdf
    • http://files.alexandriahansen.com/uploads/1/3/1/0/131070911/9098908.pdf
    • http://files.envisiongalleries.com/uploads/1/3/1/3/131380107/c91ec.pdf
    • https://cdn.shopify.com/s/files/1/0438/9430/9019/files/up_down_counter.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/vozufegaloguk.pdf
    • https://cdn.shopify.com/s/files/1/0432/7591/1321/files/sabepagekezofejaga.pdf
    • https://cdn.shopify.com/s/files/1/0438/2385/7824/files/71187129253.pdf
    • https://cdn.shopify.com/s/files/1/0428/9013/3663/files/29102576795.pdf
    • https://cdn.shopify.com/s/files/1/0439/3825/0910/files/acls_provider_manual_2015_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8290/6789/files/wizulososewubetixo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7732/0352/files/27849267121.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9347/files/classic_shaman_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/zixiluloduwizim.pdf
    • https://cdn.shopify.com/s/files/1/0431/0017/6544/files/grenade_alan_gratz_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/35700503666.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_off0000becc.bin
22118a6493ed3c5a7b3e2dd234b81198c78cb4e518a4509e656f399553b244d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBECC 5196 bytes
font_01_sfnt_off0000d077.bin
fdcd6c45d88bd99c286cea95a6702eabbaf3ffc542db55b036e9d33d4f90d2aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD077 10008 bytes

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