Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf85ff6ad557165…

MALICIOUS

PDF

51.4 KB Created: 2020-07-19 03:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b7a647d099b50c2745d74edbf73815d SHA-1: f16c23772b5a91bea04baae4d462b14130febeb4 SHA-256: ebf85ff6ad55716513bb6733f3e1c0e87c06b4923e16847526f83d1793ee1cee
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files. One critical heuristic identified a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body text is heavily obfuscated and appears to be junk data, but the presence of the link farm and the malicious redirector strongly suggest a malicious intent to drive traffic to harmful sites.

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/wb?keyword=use%20of%20marketing%20and%20sales%20information%20system%20pdf
    • http://files.isuministries.org/uploads/1/3/1/3/131398250/dakirofe.pdf
    • http://files.uprowing.com/uploads/1/3/2/7/132740457/9368014.pdf
    • http://files.jessiebrown.net/uploads/1/3/1/6/131637853/679592.pdf
    • http://files.stealthbrew.co/uploads/1/3/1/0/131069992/gakomo-wawakoxi-xadowef.pdf
    • http://files.lisaguice.net/uploads/1/3/1/3/131379085/09c663a493dcaa3.pdf
    • https://sudomabu.files.wordpress.com/2020/07/mobabepisudatuvake.pdf
    • https://defowem.files.wordpress.com/2020/07/ximitaga.pdf
    • https://xoduwataneno.files.wordpress.com/2020/07/rogawibadezotubevuf.pdf
    • https://bobovopesujo.files.wordpress.com/2020/07/vetatewagew.pdf
    • https://mosamexi.files.wordpress.com/2020/06/56022102376.pdf
    • https://dukidowa.files.wordpress.com/2020/06/68922866798.pdf
    • https://dolajova.files.wordpress.com/2020/06/23570568815.pdf
    • https://riwebaf.files.wordpress.com/2020/06/kaxizafaxovobotalabe.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/davixoligiwonosenu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9272/files/79312706371.pdf
    • https://cdn.shopify.com/s/files/1/0430/4781/3269/files/soponig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bewewolifokolugetu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/27605774946.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4833/files/45578840289.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xagene.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/20416539025.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_off00008b0b.bin
f18bf236e3047f577648505f00d23852bea948bd6b48c74b6665d4a4dbf9ca62
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0B 5304 bytes
font_01_sfnt_off00009d03.bin
8776f10e99c033ab130eaa82d572a4ab2877ed7b513c59b072280543428c9de2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D03 9960 bytes