Malicious PDF — malware analysis report

Static analysis result for SHA-256 948238770a79cc75…

MALICIOUS

PDF

40.3 KB Created: 2020-07-30 11:39:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f66857f4989c7960f8c9d34bb7e6e23e SHA-1: 2df6f421e7bce1827d60a68b1963a49e87ec5468 SHA-256: 948238770a79cc7592c061400961c8834907fdbbe15d47de237e38e96db7688c
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=nouvelle+vie+pierre+bordage+pdf', is likely used to funnel victims to further malicious content. The ML classifier strongly indicates maliciousness, supporting the attack pattern of redirecting users to potentially harmful 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.cc/pify?keyword=nouvelle+vie+pierre+bordage+pdf
    • http://files.tallispost16.com/uploads/1/3/1/3/131383514/podiponereraso.pdf
    • http://files.stephaniekeltner.com/uploads/1/3/1/3/131378990/3029704.pdf
    • http://files.talsegevphotos.com/uploads/1/3/1/3/131379183/repapekem_femiju.pdf
    • https://cdn.shopify.com/s/files/1/0430/3690/1527/files/53981579259.pdf
    • https://cdn.shopify.com/s/files/1/0436/4759/8742/files/wuluguzuxonajobetukalajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3663/0422/files/zazepegurufe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/89431772848.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/zisawovijalusibolaxufaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0880/2466/files/44692486693.pdf
    • https://cdn.shopify.com/s/files/1/0431/8520/9507/files/81596237407.pdf
    • https://cdn.shopify.com/s/files/1/0434/0174/0439/files/34544960218.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6568/files/meboluxanavi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/81820688593.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62222626122.pdf
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/95157724795.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/46937090891.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/
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/zisawovijalusi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d42.bin
f292c7f983aedd24a51a60b7bd2ede90500f7f56e5169084f6dd4a316707b63b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D42 4896 bytes
font_01_sfnt_off00006e02.bin
b2a651b2143a56d8f2213a47fe98f46074122aa056874ff3d3024a3c2ad3af8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E02 11376 bytes