Malicious PDF — malware analysis report

Static analysis result for SHA-256 95222c2a8abc8e84…

MALICIOUS

PDF

53.8 KB Created: 2020-08-02 07:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1f14bacf2521ae86f3805c31ecdc066 SHA-1: ae271c2d9f5505b3d5b1d8ead764789e12ea052f SHA-256: 95222c2a8abc8e84c31e061111c4f4a8d739b3db464f2415be9ab4b969b185a5
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=before+i+fall+online+pdf'. This indicates the document is designed to lure users to a potentially harmful destination. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and traffic to malicious sites. The ML classifier also 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.cc/pify?keyword=before+i+fall+online+pdf
    • http://files.blackwomensdayofmeditation.com/uploads/1/3/1/8/131856146/vodiladil.pdf
    • http://files.hotcrateshop.com/uploads/1/3/0/7/130776656/vopidijodaw.pdf
    • http://files.marielcosmeticsllc.com/uploads/1/3/0/7/130740256/565b076ce0e.pdf
    • http://files.rogerscitymarina.com/uploads/1/3/0/8/130873717/9516886.pdf
    • http://files.chandrabotanicals.com/uploads/1/3/1/4/131407028/3327724.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/74596027241.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/ronoxakiselibopij.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/43644692091.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2964/files/18143534045.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0135/files/79503369749.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7500/files/tawakarinasafojogo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/jugogaxitazubuzob.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/7251869026.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/27804074137.pdf
    • https://cdn.shopify.com/s/files/1/0429/3135/5807/files/tugajapiwiliwaxurobotigu.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_off00009628.bin
1215b45309557bda36d22ab1c67d2071ca098b8014e6583859051c32e9dbc3ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9628 4908 bytes
font_01_sfnt_off0000a6ed.bin
bfdd7c1cc4afba507e63c0728438d1e76108f174781461a0111d8fde93c100b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6ED 10684 bytes

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