Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae69856b443cf17…

MALICIOUS

PDF

44.1 KB Created: 2020-08-24 15:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a85156694ffd9c0e634f45e17197c387 SHA-1: ed07a53b8797d68b83a69b00ae5e60878f167824 SHA-256: 5ae69856b443cf17e822d965a529718b9211877138cab25a7d807d5839bf5a77
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 PDF files, indicating a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), suggesting a phishing or malware distribution lure. The ML classifier also strongly flagged this PDF as malicious.

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=bhakta+prahlada+all+songs+free
    • http://files.misswinniesabc.com/uploads/1/3/0/8/130813095/b1a9b40950.pdf
    • http://jiteneji.thealbibritefoundation.org/uploads/1/3/1/4/131453858/mipuwapafejogexel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7870/3511/files/setujabitusigiwerub.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4551/files/wupati.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/72725262579.pdf
    • https://cdn.shopify.com/s/files/1/0434/5164/6119/files/kootenai_bridge_academy.pdf
    • https://cdn.shopify.com/s/files/1/0457/7450/4102/files/fxcm_trading_station_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/28476321471.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3471/files/60604309926.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/antecedentes_de_la_contabilidad_libro.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2053/files/damazurutevabemularumuzo.pdf
    • https://cdn.shopify.com/s/files/1/0463/1052/3042/files/integrating_rational_functions.pdf
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/jufabizojepabet.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_off00006027.bin
bb6ff69acff1955f9fd1007c36731b71fafc5ec8db9af55bf8ae9266ae28b6cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6027 5416 bytes
font_01_sfnt_off0000728e.bin
9d64439c696d05a095fac9134fe7b6937468320d882737f33bc8554c4ea3e67d
pdf-font-stream PDF embedded font (sfnt) at offset 0x728E 15708 bytes