Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f965b4d479e1c6…

MALICIOUS

PDF

120.7 KB Created: 2020-08-13 21:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4d268fe0eabbb843b290ec7744f32dc SHA-1: eee527f7d68eb5776467f93afaf21fcfa9571807 SHA-256: 00f965b4d479e1c6aaf6688319c598a9052f1af855b20ac999807fd88e2bafac
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to a "parents guide". The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports a malicious intent, likely to drive traffic to malicious sites.

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=rodeo+and+juliet+parents+guide
    • http://files.livefiregirls.com/uploads/1/3/1/4/131453535/ce1a03f7.pdf
    • http://gifafev.kellytuckercreates.com/uploads/1/3/2/8/132814930/3852318.pdf
    • http://files.studioksandb.com/uploads/1/3/1/3/131398547/pesilemow.pdf
    • http://files.canadagripsport.com/uploads/1/3/0/7/130775268/dobalebow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/98178528153.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/uniden_powermax_5._8_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/curso_de_aprendizajes_clave_preescolar.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/monuzuxekumemefamev.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0641/files/80281318779.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8143/files/edgar_allan_poe_pdf_libros.pdf
    • https://cdn.shopify.com/s/files/1/0437/3600/6817/files/calculus_and_differential_equations_with_mathematica.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/fumamogedamoxugujilabume.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/lowesekatuzemekavoguwulu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8972/2534/files/93192896557.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/vafadodinuvuriwiged.pdf
    • https://cdn.shopify.com/s/files/1/0437/6369/5770/files/bazud.pdf
    • https://cdn.shopify.com/s/files/1/0438/3024/7584/files/research_paper_example_apa.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_off00019958.bin
2f03da072f5f4d33568952e81ca97411262d3e3d4347ad76d123f30c640aad75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19958 5212 bytes
font_01_sfnt_off0001ab26.bin
f0facd8852d5def6c613ccd894df99c4f5c51ec989a6061599099adc6ea36c4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB26 12864 bytes

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