Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7ed864ef05febd2…

MALICIOUS

PDF

43.5 KB Created: 2020-07-09 05:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbc8a46dd7cbfd2e8cf9ee686c1630d8 SHA-1: e883ee57199cd11ca597631c8f518d8adf55187d SHA-256: b7ed864ef05febd2e71ce816fe82b433620e0850986bbc4facbb09094941393d
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 a link farm structure designed to obscure the ultimate destination. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and URLs, suggesting an attempt to disguise the 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.com/wb?keyword=campaldino%201289%20pdf
    • http://files.thecherigroves.com/uploads/1/3/1/3/131398156/0c09cff1c7.pdf
    • http://files.mpowertheworld.net/uploads/1/3/2/7/132740415/kadisetiwebuget_rofajanagojata.pdf
    • http://files.bestmassagefredericksburg.org/uploads/1/3/2/6/132696155/xifadesu-xefajabak.pdf
    • http://files.connectingnicolletcounty.com/uploads/1/3/0/8/130874018/615e0b5.pdf
    • http://files.westmorelandks.com/uploads/1/3/2/8/132815752/zigidoveriv.pdf
    • http://files.nomadicsteve.com/uploads/1/3/1/4/131437538/42cb4690f8.pdf
    • http://files.easternsloperanch.com/uploads/1/3/2/6/132681404/3588728.pdf
    • http://files.bg3v3nicolet.com/uploads/1/3/2/7/132711983/8965179.pdf
    • http://files.cravecavelv.com/uploads/1/3/0/9/130969473/dirisubopiv.pdf
    • http://files.marcuswhitmannsdar.org/uploads/1/3/0/9/130969855/4b4762.pdf
    • http://files.finalfinishdetailing.com/uploads/1/3/2/7/132710655/levin_linebedanelu_vidaki_vukadidi.pdf
    • http://files.ignitetheapple.com/uploads/1/3/1/6/131606631/7fbae6.pdf
    • https://luluziru17638448.files.wordpress.com/2020/07/megedaxivadino.pdf
    • https://bebozuj.files.wordpress.com/2020/06/funakuniba.pdf
    • https://selusizaf.files.wordpress.com/2020/06/77666571406.pdf
    • https://wazipugakor.files.wordpress.com/2020/06/31320791006.pdf
    • https://vitimatojegi.files.wordpress.com/2020/06/sesilo.pdf
    • https://ruvirimijoxi.files.wordpress.com/2020/07/89131210367.pdf
    • https://wakogokanexu.files.wordpress.com/2020/07/mutebo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34530012154.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57955619809.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_off00006d45.bin
0e1288fb3433289bc6638bd88a8afce563d69d9b7bfc74607b9be634a5c25d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D45 5060 bytes
font_01_sfnt_off00007e64.bin
6655b563963055f905429de517999baa094e2f6526535228abb2e05588ac4f12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E64 10044 bytes

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