Malicious PDF — malware analysis report

Static analysis result for SHA-256 789d09d275a2b33e…

MALICIOUS

PDF

39.7 KB Created: 2020-08-18 18:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7af3e8cc699a7a9a845c85033c8fbf62 SHA-1: 19797211affa804ec5c2240d1a78c5f0cc33fad3 SHA-256: 789d09d275a2b33e48964cff29b47b83ca88f67ac9c9ec6a35757d4207c76ba4
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, suggesting a phishing or scam attempt. The document body references popular topics like 'Fortnite battle royale ipad' to entice clicks. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to malicious infrastructure.

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=fortnite+battle+royale+ipad
    • http://files.stwilliamparish.org/uploads/1/3/0/8/130814121/b04f12458304.pdf
    • http://fivigezuk.roland-realty.com/uploads/1/3/1/6/131606346/kajunisorizo-lenonumibopik-mimogag-bumanapetiki.pdf
    • http://files.mayarboretumsociety.org/uploads/1/3/2/7/132740905/d49c6f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/mathematics_formulas_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/jixinuxami.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5675/files/sirowi.pdf
    • https://cdn.shopify.com/s/files/1/0436/5893/6473/files/bludgeon_brothers_theme.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mefawubizujoki.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/4649816876.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6051/files/bali_tourism_map_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/denidakimos.pdf
    • https://cdn.shopify.com/s/files/1/0438/4659/8816/files/19491602243.pdf
    • https://cdn.shopify.com/s/files/1/0432/6775/2099/files/amparo_directo_en_materia_civil_formato.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_off00005edc.bin
a3b1edd7e5061c2e61e04042be0691862818327ce5f2eb68bab6905f3769b0d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDC 4972 bytes
font_01_sfnt_off00006fce.bin
13661ea484f5c4344ff56b72a17fbd14b09cec650679acbd6a44df0f2e01d446
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCE 10156 bytes