Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7971017b98fb572…

MALICIOUS

PDF

58.7 KB Created: 2020-08-01 02:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcb148d7512d3c51db86461836fbdcb2 SHA-1: 297a7725a54b591989476531487135c7fede2a63 SHA-256: d7971017b98fb572706f64191e6530b69111e78fe47b9d912a5ef5c6464ba05b
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The presence of a large link farm, including links to Shopify domains, suggests an attempt to obscure the true destination or to leverage trusted domains for distribution. The ML classifier strongly indicates malicious intent. The primary attack pattern involves luring users through these links, potentially leading to phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=lua+split+string
    • http://files.twinsrun.com/uploads/1/3/1/6/131606260/nudopokatexopem-gesanizile-jikobub-vikojamuwo.pdf
    • http://files.nanichionline.com/uploads/1/3/0/7/130738801/giwanaduxukotomeg.pdf
    • http://files.tigerscornerdaycare.com/uploads/1/3/0/9/130969742/pufazopawe_wusuxapegofiwo_dupakaxozupif_vopetoguxiselob.pdf
    • http://files.desirapesta.us/uploads/1/3/2/3/132302924/6318279.pdf
    • http://files.caledonjewels.com/uploads/1/3/1/3/131380258/593932.pdf
    • https://cdn.shopify.com/s/files/1/0429/2558/8639/files/xenunuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6974/files/gebivizilonaxadepujixo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0756/6239/files/nomozedanesafoma.pdf
    • https://cdn.shopify.com/s/files/1/0434/6127/9896/files/negakomutudapi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9755/files/15408385424.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/24941516374.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/soxolagaxezeluzate.pdf
    • https://cdn.shopify.com/s/files/1/0435/5234/2184/files/91620919489.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/34758672101.pdf
    • https://cdn.shopify.com/s/files/1/0440/9029/4437/files/dabusipuwomak.pdf
    • https://cdn.shopify.com/s/files/1/0429/3758/1734/files/mozart_fantasia_in_d_minor.pdf
    • https://cdn.shopify.com/s/files/1/0432/6224/7080/files/6448520167.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_off00009d72.bin
cae8ee2ddddbe1c8b96cfed5da1d1aec1f9c14a302954eb6aa2e94d9addd1b25
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D72 4928 bytes
font_01_sfnt_off0000ae49.bin
fb2ec1f976d03e81ec57c7e274cc45a9436e594544577c8fc3f9469ede06b32c
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE49 14992 bytes