Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ebd08311d9afdf…

MALICIOUS

PDF

45.4 KB Created: 2020-08-03 04:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a986319d54ff9b4ca4e2d492aebb810a SHA-1: f403ba40e4f2d7661c690cebe5e64ab5253ca733 SHA-256: 85ebd08311d9afdf42e9185482a8f4ab4ec5aab640c584eb5bcb6eecf30c9fbc
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 pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=kawasaki+engine+service+manual+pdf'. This indicates the document is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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=kawasaki+engine+service+manual+pdf
    • http://files.jenniferjoseph.org/uploads/1/3/1/8/131856852/relutelofapalejuzoz.pdf
    • http://files.crochetstylesbyashley.com/uploads/1/3/1/6/131636808/wegufevezudo.pdf
    • http://files.passoverleague.org/uploads/1/3/0/7/130739211/3583267.pdf
    • http://files.jessalynlevesque.com/uploads/1/3/2/8/132816036/nojubijugam-tapepepagufezo.pdf
    • http://files.monashsoccerclub.com/uploads/1/3/0/9/130969206/a1a40a.pdf
    • https://cdn.shopify.com/s/files/1/0431/8517/6736/files/lajulutiginu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3189/4944/files/pelunesezobojiburomudakak.pdf
    • https://cdn.shopify.com/s/files/1/0433/1179/2286/files/37171366254.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32732230761.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/misipukunimizakinolobiwun.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/soxejibi.pdf
    • https://cdn.shopify.com/s/files/1/0440/0647/3886/files/watch_dragon_ball_super_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7974/5192/files/69748411671.pdf
    • https://cdn.shopify.com/s/files/1/0437/7722/8957/files/72993125121.pdf
    • https://cdn.shopify.com/s/files/1/0433/5101/5577/files/74075946509.pdf
    • https://cdn.shopify.com/s/files/1/0438/2644/6498/files/wenolexaluvus.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_off000070bf.bin
7bc9394be31879e940fe0b58ed3f4b1ca2e08e8f5814bdebf8e896ba58297520
pdf-font-stream PDF embedded font (sfnt) at offset 0x70BF 5660 bytes
font_01_sfnt_off00008412.bin
0497973366e974a18972830ed2cf775f3a08bd33cd43594c198788842eacac8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8412 10568 bytes