Malicious PDF — malware analysis report

Static analysis result for SHA-256 15024da509c761a4…

MALICIOUS

PDF

35.9 KB Created: 2020-08-17 03:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c9a6372c2da6741eb1ca6d63c01dd75 SHA-1: db643fe6672f54e417a7936da1b74fdc79e2fcb2 SHA-256: 15024da509c761a4eb84e57aa67defb232e3489136054be3eec225c8f7ac03c0
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to a known malicious redirector, ttraff.com, which is designed to obscure the final destination. The document body, though partially corrupted, includes the URL and a title suggesting a lure for users interested in biotechnology. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the embedded links.

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.com/pify?keyword=introduccion+a+la+biotecnologia+vegetal+pdf
    • http://zilugexo.bsmga.com/uploads/1/3/1/3/131379552/178ac0ef447dcb4.pdf
    • http://files.danielstorage.com/uploads/1/3/0/9/130969190/1243452.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0445/4980/0100/files/joindre_des_en_ligne.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28650507632.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/82908663167.pdf
    • https://cdn.shopify.com/s/files/1/0429/0510/8636/files/84349370460.pdf
    • https://cdn.shopify.com/s/files/1/0439/4500/1115/files/xibuwotifo.pdf
    • https://cdn.shopify.com/s/files/1/0439/2579/9067/files/57007775932.pdf
    • https://cdn.shopify.com/s/files/1/0453/1912/7195/files/proceso_administrativo_de_ventas.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/86490146382.pdf
    • https://cdn.shopify.com/s/files/1/0428/5058/2684/files/arduino_due_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/saruwozipevokebik.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_off000050b9.bin
daa371af26a44bd6ba2230c7880ca4e7b1271b503ef4cd829d51df22e356a94f
pdf-font-stream PDF embedded font (sfnt) at offset 0x50B9 5284 bytes
font_01_sfnt_off000062c0.bin
a4f8ad228ad1fddd6f897120ea8090b5be47df2ed478d71b110277cbf4597dd4
pdf-font-stream PDF embedded font (sfnt) at offset 0x62C0 9468 bytes