Malicious PDF — malware analysis report

Static analysis result for SHA-256 f719e4c79cfd4273…

MALICIOUS

PDF

53.1 KB Created: 2020-08-06 11:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06bad02295103bd4f1bc9b27280bb563 SHA-1: c2168213e667eb60f1c2a64682c2296f065e95ca SHA-256: f719e4c79cfd427308e7f2ea4ef4706115c23cfde62d2b6ac2c297bb533ebc46
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised with a seemingly legitimate document title. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of malicious intent.

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=attestation+sur+l+honneur+de+prise+en+charge+pdf
    • http://tiripov.alphasigmaindkg.org/uploads/1/3/0/8/130874038/lopitajigeworo_tumafum.pdf
    • http://files.hard2faze.com/uploads/1/3/0/7/130739247/c45010f4c.pdf
    • http://ziweg.edwardoriginals.com/uploads/1/3/1/4/131408024/5042927.pdf
    • http://libuzosu.fishandswallowproductions.com/uploads/1/3/1/3/131380485/vovus.pdf
    • http://files.dadonkeyonline.com/uploads/1/3/1/6/131607407/mulekojunil-gigas.pdf
    • https://cdn.shopify.com/s/files/1/0429/5399/8487/files/10837119980.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1133/files/midco_speed_test.pdf
    • https://cdn.shopify.com/s/files/1/0440/4035/6005/files/21993922224.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4204/files/varaxigokemuri.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/firujidopadotitariripuxas.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3616/files/77027620193.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/98824415791.pdf
    • https://cdn.shopify.com/s/files/1/0428/2155/0247/files/genudosojama.pdf
    • https://cdn.shopify.com/s/files/1/0429/1608/5923/files/17081232115.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/viwijo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/80217856443.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/wudimojewejusunugatevola.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_off00007f7b.bin
23be7caeed1e8ff24f407d3a0c6f845e751c735162441d2aa6f2cf68aa5c0afb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7B 5408 bytes
font_01_sfnt_off000091d7.bin
7c5a74cce0f24c54661e8b8f9a2837db13e82081c9c6c06d40c1f51146a18658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D7 17036 bytes

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