Malicious PDF — malware analysis report

Static analysis result for SHA-256 568cb1338738e205…

MALICIOUS

PDF

43.1 KB Created: 2020-08-06 09:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbe2de2fb7d3632dbf57e652a6d140e0 SHA-1: aac93644ac43d2b6ac37c5e42f0301a244f77e40 SHA-256: 568cb1338738e2054aadb690afec6b14d8f7bddf67ca6b787dcb1346aaae2639
150 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 PDFs hosted on Shopify. One prominent link, 'https://ttraff.ru/pify?keyword=corpus+christi+hooks+schedule+2020+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be a lure for users searching for a 'Corpus Christi hooks schedule 2020 pdf'. The presence of numerous external links and the malicious redirector strongly suggest a phishing or malicious content distribution attempt.

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=corpus+christi+hooks+schedule+2020+pdf
    • http://fezojo.stereocore.net/uploads/1/3/2/8/132816066/luxubezafogune-pobujumazi.pdf
    • http://files.maderavistatownhouses.com/uploads/1/3/1/6/131607712/67ccb1825f.pdf
    • http://files.jinyu.us/uploads/1/3/2/6/132681264/divamimefe-kigaxifa-jisowarugivo.pdf
    • http://files.monfortestatesdacula.com/uploads/1/3/1/4/131438418/pikapegusadi-vavuno.pdf
    • http://files.irisfelix.com/uploads/1/3/0/9/130969705/0d06505d1ceb9e.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/teroka.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/toefl_reading_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/5719/1843/files/45289518014.pdf
    • https://cdn.shopify.com/s/files/1/0437/7329/6801/files/how_to_write_github_readme.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/zixotorowizototar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/95149201979.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/51945423478.pdf
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/zujikutinaxagujugipupiri.pdf
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/nomosadasijomizolizilux.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/bemepakawagufufi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/50340992348.pdf
    • https://cdn.shopify.com/s/files/1/0431/6279/6186/files/englisch_aufgaben_simple_past.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_off00005eb0.bin
28d54d14058f9b93b5aee2849bb12a096b6c27e672e85b3ed09ee38d47b05caf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB0 5276 bytes
font_01_sfnt_off000070a0.bin
8c1db0548b42a7b28bd4c85296777524241c5939555efceb1b6f3fecb94f3b11
pdf-font-stream PDF embedded font (sfnt) at offset 0x70A0 14444 bytes