Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ff982d2dab6e66…

MALICIOUS

PDF

35.6 KB Created: 2020-08-23 08:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1615cc5c281fd530f4a2b8981f0c43f4 SHA-1: 6df916fa0616b7663a6af9ff86d41cefee0b9b23 SHA-256: 09ff982d2dab6e66550d460b6669573bce31bf9898cb3c037eee83260da3ad59
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to redirect users to potentially malicious content. One prominent URL, 'https://ttraff.ru/pify?keyword=child%2527+s+play+1988+movie++720p', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a social engineering attempt to trick users into clicking through 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.ru/pify?keyword=child%2527+s+play+1988+movie++720p
    • http://files.caterworldeventequipment.com/uploads/1/3/1/3/131381021/gasubajaxoduna-temujevimumumod.pdf
    • http://files.generationbilliards.com/uploads/1/3/0/8/130874326/201fc478eda336.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0433/6153/4111/files/bomberman_race_ps1.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/sawarodilexil.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/microsoft_excel_advanced_course.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/11113279800.pdf
    • https://cdn.shopify.com/s/files/1/0429/1565/9942/files/vofadofugefavaxikibol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1468/files/93850238083.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/tavevutewodakisurebef.pdf
    • https://cdn.shopify.com/s/files/1/0438/0118/2369/files/xifuvideb.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/a_course_in_behavioral_economics.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_off0000483c.bin
d395e6271f8bed2ec701605a90bde4cabd0810b0d5c02d05b22ac0e3d5053343
pdf-font-stream PDF embedded font (sfnt) at offset 0x483C 5960 bytes
font_01_sfnt_off00005c80.bin
bce70cfca31bb6152c788735e754eadb6ffa539833011d53e848bf05b08de8d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C80 10896 bytes