Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f9afca189263fc…

MALICIOUS

PDF

48.3 KB Created: 2020-08-08 22:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30aaed3f44ea909a1476e63bfab71ce9 SHA-1: 3ffd3aa33df834cb51791fea018e44b4a15ab80e SHA-256: 10f9afca189263fce10de44e01fdc8bb29762c602de8cb013c11a8dc98f151c7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. It also features a large number of external PDF links, suggesting a link farm for SEO manipulation. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful 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=bsc+mathematical+methods+book+pdf
    • http://muxufiju.kazquilting.com/uploads/1/3/2/7/132712615/fezulusedilaza_gemugenejezum_giweke.pdf
    • http://files.dzyn73.com/uploads/1/3/1/1/131164351/xeminofunutagiwisu.pdf
    • http://files.seancotton.com/uploads/1/3/1/4/131453451/60fdbec51.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6503/9261/files/pm_awas_yojana_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/85313555487.pdf
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/51619510493.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/borakemedezirokesupo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/86230624642.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/1718361687.pdf
    • https://cdn.shopify.com/s/files/1/0435/3451/6376/files/carcinoma_de_celulas_escamosas_equino.pdf
    • https://cdn.shopify.com/s/files/1/0429/2011/6380/files/topufuzuxitovijas.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/kasesate.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/felapesadajalevirat.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/mamafozasaf.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f49.bin
a83c5f93e30f6046ad1f77b6715b286a3655c11d3e0c93e644f82e3aec7564f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F49 5552 bytes
font_01_sfnt_off000071f9.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F9 1800 bytes
font_02_sfnt_off00007a86.bin
dad370f7860ec936bddfd3159b11a21efee807f830e7a6846e67765acf8142db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A86 10616 bytes
font_03_sfnt_off00009f03.bin
3b1167557c0500c78008053c404847a906c4d495ef15adec583fc97e76626070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F03 16068 bytes

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