Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ea8364b68bb705…

MALICIOUS

PDF

46.6 KB Created: 2020-08-14 14:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d96af617c38723de2918a4166393e03 SHA-1: 23da93db63a86af8d92f0a9345707bcc72da3d3b SHA-256: 15ea8364b68bb705baf136cd0853e464cd7baf9ca1962dab3730dd2050ef3e9b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same URL, suggesting an intent to drive traffic to malicious or SEO-farmed content.

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.ru/pify?keyword=cheeni+kum+320kbps+songs
    • http://files.projecthumanenepal.org/uploads/1/3/1/4/131412181/xavojomog.pdf
    • http://files.toledoia.com/uploads/1/3/0/7/130738596/850013.pdf
    • http://fotinezas.glenagould.com/uploads/1/3/1/4/131452825/e8da90e0c77094d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/mesegogopegokilitunigora.pdf
    • https://cdn.shopify.com/s/files/1/0436/9137/6794/files/zewuzaledaveselomasarisi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0450/2175/7590/files/desequilibrio_acido_base.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1254/files/85632801579.pdf
    • https://cdn.shopify.com/s/files/1/0435/4949/1359/files/13774610125.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/51888201010.pdf
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/guxiximekidiniz.pdf
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/arsene_lupin_contra_herlock_sholmes.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/scope_of_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0448/1168/1958/files/government_bams_colleges_in_maharashtra.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3964/files/lujiwujalidiwababogof.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_off00006dd9.bin
fd08438d69d33ecb898208d0da911184bded6b36acefe4125030f927adf6a2ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD9 5440 bytes
font_01_sfnt_off00008032.bin
72e0cff929724337c8f0f1b5d7e372f0385a057efd6341c86d2836410962e13f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8032 14632 bytes