Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e3ab4f8478d1c2…

MALICIOUS

PDF

35.9 KB Created: 2020-08-07 13:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7294060505deace3e177e382ea18f5d3 SHA-1: 4bdd75eaa87c2079e10fc9079f591bb7efd41010 SHA-256: 63e3ab4f8478d1c2674fc2372926f31fcbfd66aa261bd9754b1bc24e34b61dca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with the primary URL `https://ttraff.ru/pify?keyword=brihaspativar+katha+pdf` identified as a malicious redirector. This suggests the document is part of a link farm or SEO spam campaign designed to lead users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to lure users into clicking through to potentially 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.ru/pify?keyword=brihaspativar+katha+pdf
    • http://files.ripplesoffaith.com/uploads/1/3/1/0/131071252/9fa8370e.pdf
    • http://files.boxmouthdesigns.com/uploads/1/3/0/9/130968961/f8235ef50f0af.pdf
    • http://repiv.sebringangels.com/uploads/1/3/0/7/130739227/3d9b3a68cc686.pdf
    • http://files.scentedgrove.com/uploads/1/3/0/7/130776015/tesubuguzajuf_kinesebajat_satipumoli.pdf
    • http://files.behindthesedoors.co.uk/uploads/1/3/1/4/131483235/sidiwom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/2059/7923/files/retopelamezef.pdf
    • https://cdn.shopify.com/s/files/1/0438/0983/3117/files/rutafefejilewoka.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/93001690043.pdf
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/xugibe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/jinomewekak.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/64312687182.pdf
    • https://cdn.shopify.com/s/files/1/0440/3075/4966/files/sigekoxakanimen.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/patugusozevuzipajuke.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2501/files/59323417044.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050e6.bin
c6592b6a1a7def119764897881cc18d6feda5820a44fa10c802806a93ef5b7f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x50E6 5268 bytes
font_01_sfnt_off000062d3.bin
b7580ef3da2a7ce9280badafb36c4607411f9e8644785b38f7785ab9477fe83d
pdf-font-stream PDF embedded font (sfnt) at offset 0x62D3 9488 bytes