Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa4b92313cfa906…

MALICIOUS

PDF

36.5 KB Created: 2020-08-08 09:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03aee518284ac5b963184f612d73046c SHA-1: 0126046d7144ea45b60c5badbcd1ba951f73a1e4 SHA-256: eaa4b92313cfa906fe03fbd20cbaadd2a8b2f557cfbf40f1f49370aff4d1c6a4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=edit+pdf+files+online+without+installing+any+software'. This URL is presented within the document body, disguised as a utility for editing PDF files. The document also contains a large number of embedded links, many of which point to external Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=edit+pdf+files+online+without+installing+any+software
    • http://files.ninakawar.com/uploads/1/3/1/3/131383319/f500fb66d4.pdf
    • http://nizomaxi.badassbookbox.com/uploads/1/3/1/6/131607600/korigolopirow.pdf
    • http://razodutir.cottageforrentontario.ca/uploads/1/3/2/6/132695569/wazuxemug-mevubironik-pinupomazutit.pdf
    • http://files.tidypdx.com/uploads/1/3/0/7/130774962/gapopojinow.pdf
    • http://zunub.bonavialimo.com/uploads/1/3/0/9/130969723/dojotome.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8453/files/5_o_clock_in_the_morning_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/pufudafadoburisotaxipem.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/data_warehouse_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/0168/2843/files/16148936449.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3568/files/22284899921.pdf
    • https://cdn.shopify.com/s/files/1/0433/4924/6102/files/pagasipigizekidake.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10588857949.pdf
    • https://cdn.shopify.com/s/files/1/0435/9575/9779/files/wowipeveripi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/18019680758.pdf
    • https://cdn.shopify.com/s/files/1/0432/1171/8820/files/zisewerudozus.pdf
    • https://cdn.shopify.com/s/files/1/0433/2827/4585/files/94959424814.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/647973840.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fff.bin
a0533d4cf802b20b2216908e071223228fdc6c8b572a43695337d72240b8c09f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FFF 5452 bytes
font_01_sfnt_off000062a7.bin
d0fdf78a3d79293283fafb02a383dae4be6040acabc9c3a41bcfc460318301bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x62A7 10056 bytes