Malicious PDF — malware analysis report

Static analysis result for SHA-256 17dde43321adca3b…

MALICIOUS

PDF

42.1 KB Created: 2020-08-20 19:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2e8c8ec755a4929ade5040cb4ad68de SHA-1: 172f6b197c8431d2a92f469ec257a7e6402b6f96 SHA-256: 17dde43321adca3be1ffafc5402785054cda761364a4c3ce9b793998f76767c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure, indicating an attempt to lead users to harmful sites. The document body, though heavily obfuscated, contains a URL that aligns with this malicious redirection pattern.

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=las+reformas+borbonicas+cuales+fueron
    • http://zekinila.dudleysafes.com/uploads/1/3/1/3/131380005/25c8baad520.pdf
    • http://files.shop-at-revived.com/uploads/1/3/0/7/130775760/9420624.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5648/0935/files/sopewikazigobuvudabof.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/systems_understanding_aid_9th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/84659469279.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/41996986552.pdf
    • https://cdn.shopify.com/s/files/1/0434/4872/9766/files/boulder_county_election_results.pdf
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/94555185674.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/16386112523.pdf
    • https://cdn.shopify.com/s/files/1/0438/5298/8566/files/56459034567.pdf
    • https://cdn.shopify.com/s/files/1/0430/9408/1687/files/affirmative_tu_commands_spanish_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0439/4231/4152/files/habit_burger_grill_menu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3493/5447/files/physical_science_grade_11_platinum_textbook.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_off000065b5.bin
20b9c093d609f3115e8497eaff49e8338809a176d43f8832d3b350947dc45843
pdf-font-stream PDF embedded font (sfnt) at offset 0x65B5 5108 bytes
font_01_sfnt_off00007704.bin
ad4016a0d0f5ba28fc2566061e73cf2d04e50444a2cad7994c9534c3babbbefc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7704 11184 bytes