Malicious PDF — malware analysis report

Static analysis result for SHA-256 695b24c4a4868111…

MALICIOUS

PDF

43.1 KB Created: 2020-08-03 12:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f52b36d9e63609278307921402b6136 SHA-1: a1d7bbd2602665ae64d575bd02e4c44fc2522bfe SHA-256: 695b24c4a4868111ef74f033a81cb5d3be79078de0966bf02437a28fa39f5de2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are hosted on Shopify and appear to be part of a link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=jj+benitez+caballo+de+troya+4+pdf', is identified as a known malicious redirector. This suggests the document is designed to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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=jj+benitez+caballo+de+troya+4+pdf
    • http://files.leisuretravelplus.com/uploads/1/3/1/3/131384432/5756364.pdf
    • http://files.metalmeltdown.com/uploads/1/3/0/7/130775755/36f932b68a.pdf
    • http://files.christ-presbyterianchurch.org/uploads/1/3/1/3/131378923/fabuwugajakizer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0482/8580/files/51852358369.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luvibuxunefipefijuli.pdf
    • https://cdn.shopify.com/s/files/1/0439/0119/0299/files/87375820086.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/fotejosapoxewonagululeko.pdf
    • https://cdn.shopify.com/s/files/1/0434/0862/1719/files/bevaligokatupolomezebamel.pdf
    • https://cdn.shopify.com/s/files/1/0429/1887/1207/files/96362443540.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/gomulasoruma.pdf
    • https://cdn.shopify.com/s/files/1/0440/8829/5576/files/sowufudapojugax.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0491/files/90395541903.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rixaraxamixenapo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/wudake.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.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_off00006720.bin
d22456320d818194572c93fc81db6d26cb4fa6e40dfbb358aa1a533d14095bcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6720 5416 bytes
font_01_sfnt_off000079b6.bin
3359377fe5233d2949750d049545527cde8bbabc9bcd1284fa88d1803c61c803
pdf-font-stream PDF embedded font (sfnt) at offset 0x79B6 11180 bytes