Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb402157099c654d…

MALICIOUS

PDF

45.0 KB Created: 2020-07-28 10:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e857f7ee86628cfacfb68f57271f0866 SHA-1: b83a6f4756112c9d3527465d05c9d053a95cece4 SHA-256: fb402157099c654dcd428a36ff2f4b5702010e872b6180aa8d8863de232eb25a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites. One of these links, 'https://ttraff.cc/pify?keyword=anew+ultimate+supreme+advanced+performance+creme', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a product description, suggesting a lure to entice users to click on the malicious links. The ML classifier 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=anew+ultimate+supreme+advanced+performance+creme
    • http://files.craigewanpg.club/uploads/1/3/0/9/130970016/zisitiwof.pdf
    • http://files.theweeklybeaver.com/uploads/1/3/1/6/131637257/muwekifejerorisuvob.pdf
    • http://files.publicgypsum.com/uploads/1/3/0/7/130739488/344643.pdf
    • http://files.rockhamptonfolkfest.org.uk/uploads/1/3/0/9/130969300/guziluxavavopo-bapuzemaxok.pdf
    • http://files.losaldrama.org/uploads/1/3/2/6/132682790/dugagabes-mokegapevujak.pdf
    • http://files.losaldram
    • https://cdn.shopify.com/s/files/1/0437/3096/0536/files/nasebipasamerabekes.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/25412270578.pdf
    • https://cdn.shopify.com/s/files/1/0429/1015/4908/files/6932639591.pdf
    • https://cdn.shopify.com/s/files/1/0435/5293/1995/files/xedixuvitivoxetevikemu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tunamowari.pdf
    • https://cdn.shopify.com/s/files/1/0430/2507/2282/files/xazurexusagiwaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/lamabevu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/talapulugomudu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/wopexilujopaviwotom.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/lurepanubizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/wibejezavetixememedivil.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_off00006e77.bin
8a757caee632fa94006460c320286061cd3e28ef3f2d4257c5d1ff4f6eeb00cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E77 5324 bytes
font_01_sfnt_off00008086.bin
a225b6962a186fcd9bf5e7c9835724d3d83ea67d46b46558f5de95c8f1299100
pdf-font-stream PDF embedded font (sfnt) at offset 0x8086 11132 bytes