Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dafef2e48e8b591…

MALICIOUS

PDF

64.6 KB Created: 2020-08-16 13:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fabd2fb2f003a61583fa61a3c8df6de5 SHA-1: e43ad561811c18794d4a3b9ef256b3b23e4aedd6 SHA-256: 5dafef2e48e8b591c48d76bcb56919dc1bef835a9f11c3b73b9bf474cce21239
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious domains. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that the document is designed to direct users to external sites, likely for malicious purposes such as phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=angular+mat-+table+formarray
    • http://files.dianejarviart.com/uploads/1/3/1/0/131070762/sabisudexunejaf_sexaturi_mixobajuje.pdf
    • http://gapife.mootingsyndicate.org/uploads/1/3/0/7/130776330/fetomesune-simapileb.pdf
    • http://febuvimo.guulmonstru.com/uploads/1/3/1/6/131637562/nafonajijofiduta.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/toxozilarupi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/bewax.pdf
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/top_affiliate_programs_platforms.pdf
    • https://cdn.shopify.com/s/files/1/0427/8213/0332/files/honda_gcv160_lawn_mower.pdf
    • https://cdn.shopify.com/s/files/1/0430/8487/3879/files/91342965846.pdf
    • https://cdn.shopify.com/s/files/1/0430/3742/5818/files/pubijivubixusas.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/5392954057.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/81485506195.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/19291980990.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009acc.bin
c5b6b91cd13563ad0c088406c70e5e5fabccc806e3e5d473ad38ab904a0e12c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9ACC 5172 bytes
font_01_sfnt_off0000ac62.bin
e7debd00e3b8c5157cbb35a578d3c7bb7e21c3ca1e8e2ee1410040b0684bcb6a
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC62 16624 bytes
font_02_sfnt_off0000e033.bin
d9b012042df5fe8dc074c42eae0f7627b15178249d85eb70dc7afc452d134ec7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE033 16132 bytes