Malicious PDF — malware analysis report

Static analysis result for SHA-256 0951f829f5f58fab…

MALICIOUS

PDF

40.6 KB Created: 2020-08-08 16:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 171e7fa7974cb5a8815a7e2bbccb064a SHA-1: a29e1455704d468f1fe961cfc173405b82b02a3a SHA-256: 0951f829f5f58fabeffffbe5aa385c57473ab9da9cbc9254fccd4664a6e3c037
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one specifically identified as a malicious redirector. The heuristic firings indicate the PDF is designed to link to external content, potentially for SEO manipulation or to host malicious payloads. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious campaign.

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=online+pdf+to+autocad+dwg+converter
    • http://files.seankinsky.com/uploads/1/3/0/8/130873741/gadasobe-lowimoxixexodip.pdf
    • http://makepinu.beyondthegameplan.com/uploads/1/3/0/7/130775429/cb51fd0abf7d.pdf
    • http://files.dianethome.com/uploads/1/3/0/7/130740212/dipefu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0504/8989/files/aacomas_personal_statement.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3383/files/acls_manual_2016.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/bazojebokogegobumoruje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40948382406.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/2547912625.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/75138982390.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/nulobofetufifine.pdf
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/69421794782.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdf
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/sukuweboxe.pdf
    • https://cdn.shopify.com/s/files/1/0439/9503/7854/files/agreement_of_purchase_and_sale_of_shares_by_shareholder.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_off000060bb.bin
0d2c287a7de6cf7aec130e86faa565ccfafd5c273412b79d976f106e37b00d2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 5324 bytes
font_01_sfnt_off00007301.bin
b5894b7a8c9b30c3bf2975daab205e9bba8f13d919bc497f947055c917101ee6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7301 10092 bytes